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Home My WebLink About3_FINAL_CSA Supplement 2_Belews_TablesTable 1-1: Well Construction Information Monitoring Well • AB-1BR Monitoring Well Type Bedrock Northing 928655.4328 Easting 1682496.125 TOC Elevation 772.827 Casing Type PVC Casing • 6.0 Casing 3.41 Top of 97.312 Bottom of 102.312 Total Depth 106.912 Program CAMA AB-4BRD Bedrock 925617.8953 1683261.955 762.504 PVC 6.0 3.67 160.972 165.972 174.572 CAMA GWA-16BR Bedrock 926704.1883 1681130.895 783.662 PVC 6.0 3.14 101.635 106.635 107.435 CAMA GWA-18D Deep 927847.9534 1681417.466 774.537 PVC 6.0 3.20 59.198 64.198 73.198 CAMA GWA-18S-A Shallow 927855.2665 1681414.598 774.592 PVC 2.0 3.26 14.263 29.263 31.263 CAMA GWA-19D Deep 928203.1569 1680896.709 743.244 PVC 6.0 3.05 41.051 46.051 50.051 CAMA GWA-19S-A Shallow 928195.8117 1680902.523 743.328 PVC 2.0 3.27 7.265 22.265 25.265 CAMA GWA-20BR Bedrock 928565.2731 1681746.533 773.69 PVC 6.0 3.42 84.42 89.42 117.42 CAMA GWA-20D Deep 928576.0984 1681755.493 773.724 PVC 6.0 3.28 58.28 63.28 68.28 CAMA GWA-20S-A Shallow 928579.7068 1681758.479 773.84 PVC 2.0 3.25 10.245 25.245 28.245 CAMA GWA-21D Deep 928908.0086 1681367.117 734.791 PVC 6.0 3.12 27.72 32.72 40.12 CAMA GWA-21S Shallow 928900.6634 1681372.932 735.009 PVC 2.0 3.13 9.129 19.129 20.129 CAMA GWA-22D Deep 928366.8409 1687317.739 735.726 PVC 6.0 3.50 32.50 37.50 38.50 CAMA GWA-22S Shallow 928366.9039 1687311.845 738.098 PVC 2.0 NM NM NM NM CAMA GWA-23D Deep 922851.5672 1683865.798 811.792 PVC 6.0 2.51 56.605 61.605 63.005 CAMA GWA-23S Shallow 922851.5353 1683868.746 811.567 PVC 2.0 2.20 24.4 39.4 47.2 CAMA GWA-24D Deep 930055.0396 1682694.038 642.21 PVC 6.0 3.10 16.097 21.097 23.097 CAMA GWA-24S Shallow 930055.1035 1682688.144 643.205 PVC 2.0 2.92 7.922 12.922 12.922 CAMA GWA-25BR Bedrock 922791.7465 1680990.972 855.759 PVC 6.0 3.28 98.275 103.275 108.275 CAMA GWA-26BR Bedrock 922896.9342 1681027.493 854.991 PVC 6.0 3.13 86.13 91.13 113.13 CAMA GWA-26D Deep 922897.0627 1681015.703 856.801 PVC 6.0 2.80 65.80 70.80 72.80 CAMA GWA-26S Shallow 922896.9985 1681021.598 856.161 PVC 2.0 3.29 36.29 51.29 54.29 CAMA GWA-27BR Bedrock 928449.2431 1681368.015 758.319 PVC 6.0 2.86 110.86 115.86 118.86 CAMA GWA-27D Deep 928441.9942 1681364.989 758.304 PVC 6.0 2.57 40.57 45.57 46.87 CAMA GWA-27S Shallow 928445.6347 1681365.029 758.424 PVC 2.0 2.64 9.64 24.64 29.64 CAMA GWA-9BR Bedrock 924737.8967 1681483.819 794.533 PVC 6.0 2.96 118.76 123.76 132.96 CAMA MW-201BR Bedrock 928567.6194 1686927.896 783.765 PVC 6.0 2.40 100.395 105.395 107.695 CAMA AB-1D Deep 928651.31 1682506.67 772.47 PVC 6.0 3.00 76.00 81.00 89.00 CAMA AB-1S Shallow 928652.75 1682501.26 772.42 PVC 2.0 2.93 37.93 52.93 54.93 CAMA AB-2D Deep 928574.52 1683157.33 773.84 PVC 6.0 3.13 135.13 140.13 142.13 CAMA AB-2S Shallow 928574.12 1683164.79 773.94 PVC 2.0 3.25 34.25 49.25 53.25 CAMA AB-3D Deep 928697.23 1683745.40 772.51 PVC 6.0 2.71 113.71 118.71 120.71 CAMA AB-3S Shallow 928699.41 1683750.83 772.62 PVC 2.0 2.70 38.70 53.70 57.70 CAMA AB-41313 Bedrock 925622.16 1683236.93 761.99 PVC 6.0 2.75 140.25 145.25 147.25 CAMA AB-4D Deep 925617.71 1683239.22 762.21 PVC 6.0 2.96 92.46 97.46 97.46 CAMA AB-4S Shallow 925609.10 1683245.84 762.18 PVC 2.0 2.82 5.82 20.82 20.82 CAMA AB-4SL Shallow 925613.98 1683243.16 762.25 PVC 2.0 3.10 54.40 64.40 64.40 CAMA A13-51) Deep 925835.07 1683654.31 762.13 PVC 6.0 3.19 100.19 105.19 107.59 CAMA AB-5S Shallow 925826.14 1683643.87 761.9 PVC 2.0 3.04 6.04 21.04 21.04 CAMA A13-5SL AB-613 Shallow Deep 925830.45 925975.31 1683648.40 1684557.84 761.85 765.33 PVC PVC 2.0 6.0 2.84 3.11 36.84 88.11 46.84 93.11 46.84 97.71 CAMA CAMA Belews Creek Steam Station Page 1 of 3 CSA Supplement 2 Table 1-1: Well Construction Information Monitoring Well • AB-6S Monitoring Well Type Shallow Northing - 925967.88 Easting 1684548.14 TOC Elevation 765.55 Casing Type PVC Casing • 2.0 Casing 3.09 Top. Bottom btoc 5.09 of ft btoc 15.09 Total Depth ft btoc 15.09 Program CAMA AB-6SL Shallow 925971.58 1684552.45 765.5 PVC 2.0 3.12 16.42 21.42 21.42 CAMA AB-7D Deep 925222.99 1684495.40 771.14 PVC 6.0 3.42 87.42 92.42 94.42 CAMA AB-7S Shallow 925209.92 1684491.49 771.09 PVC 2.0 3.18 8.18 18.18 19.18 CAMA AB-8D Deep 925009.61 1683904.80 765.38 PVC 6.0 3.28 75.28 80.28 87.98 CAMA AB-8S Shallow 925019.79 1683895.81 765.1 PVC 2.0 2.94 6.94 21.94 23.94 CAMA AB-8SL Shallow 925014.83 1683900.49 765.29 PVC 2.0 3.25 40.25 50.25 57.65 CAMA AB-9BR Bedrock 924580.20 1684169.24 782.84 PVC NR 3.00 133.00 138.00 140.30 CAMA AB-91) Deep 924587.65 1684181.06 782.84 PVC 6.0 3.15 93.15 98.15 101.15 CAMA AB-9S Shallow 924582.60 1684174.19 783.15 PVC 2.0 3.41 16.41 31.41 34.41 CAMA BG-1D Deep 929473.28 1686139.35 808.48 PVC 6.0 2.85 49.85 54.85 59.85 CAMA BG-1S Shallow 929469.73 1686141.78 808.75 PVC 2.0 3.57 29.67 44.87 46.57 CAMA BG-2BR Bedrock 929471.79 1687480.08 812.59 PVC 2.0 2.54 83.04 88.04 132.04 CAMA BG-2D Deep 929467.23 1687483.75 812.13 PVC 6.0 2.18 72.18 77.18 82.18 CAMA BG-2S Shallow 929463.08 1687486.74 811.8 PVC 2.0 2.08 42.08 57.08 62.08 CAMA BG-3D Deep 922175.91 1680643.03 844.61 PVC 6.0 2.89 64.89 69.89 73.89 CAMA BG-3S Shallow 922181.41 1680644.11 845.64 PVC 2.0 3.18 28.18 43.18 47.18 CAMA GWA-10D Deep 927959.41 1681044.63 749.54 PVC 6.0 2.50 52.50 57.50 66.50 CAMA GWA-10S Shallow 927962.34 1681038.32 749.11 PVC 2.0 2.33 6.33 21.33 28.33 CAMA GWA-11D Deep 928901.25 1681539.67 757.04 PVC 6.0 2.43 65.43 70.43 74.43 CAMA GWA-11S Shallow 928897.66 1681535.08 757.03 PVC 2.0 2.54 25.54 40.54 60.54 CAMA GWA-12BR Bedrock 922343.07 1683369.37 836.46 PVC 6.0 3.11 109.11 114.11 128.11 CAMA GWA-12D Deep 922342.71 1683363.55 837.16 PVC 6.0 3.12 66.12 71.12 77.12 CAMA GWA-12S Shallow 922344.28 1683376.35 835.79 PVC 2.0 3.14 43.14 58.14 62.14 CAMA GWA-16D Deep 926704.60 1681117.41 784.53 PVC 6.0 2.87 60.87 65.87 71.87 CAMA GWA-16S Shallow 926702.99 1681121.24 784.41 PVC 2.0 2.90 31.90 46.90 49.90 CAMA GWA-17D Deep 926926.44 1681036.23 787.37 PVC 5.0 2.30 52.30 57.30 59.30 CAMA GWA-17S Shallow 926932.90 1681038.01 787.61 PVC 2.0 2.54 27.54 42.54 44.04 CAMA GWA-1D Deep 929316.22 1682257.39 743.03 PVC 6.0 2.13 60.13 65.13 73.63 CAMA GWA-1S Shallow 929324.44 1682258.38 743.08 PVC 2.0 2.36 21.36 36.36 38.36 CAMA GWA-2D Deep 928983.86 1684580.09 787.51 PVC 6.0 2.93 60.93 65.93 72.93 CAMA GWA-2S Shallow 928981.70 1684574.56 787.58 PVC 2.0 3.08 37.08 52.08 54.08 CAMA GWA-3D Deep 928244.81 1687439.70 769.5 PVC 6.0 2.82 47.82 52.82 61.82 CAMA GWA-3S Shallow 928248.83 1687434.40 769.14 PVC 2.0 2.63 29.63 44.63 45.63 CAMA GWA-4D Deep 927628.53 1686395.91 802.88 PVC 6.0 3.25 67.25 72.25 77.25 CAMA GWA-56132 Bedrock 926679.88 1685896.93 792.11 PVC 5.0 3.08 83.08 88.08 112.08 CAMA GWA-5D Deep 926686.52 1685893.68 791.29 PVC 6.0 2.83 54.63 59.63 63.33 CAMA GWA-5S Shallow 926681.92 1685905.35 792.04 PVC 2.0 3.16 26.16 41.16 43.16 CAMA GWA-6D Deep 924879.81 1685602.03 793.25 PVC 6.0 2.32 103.32 108.32 111.32 CAMA GWA-6S GWA-7D Shallow Deep 924874.41 924088.36 1685608.92 1685211.30 793.37 822.7 PVC PVC 2.0 6.0 2.42 2.31 30.42 81.31 45.42 86.31 72.42 93.31 CAMA CAMA Belews Creek Steam Station Page 2 of 3 CSA Supplement 2 Table 1-1: Well Construction Information Monitoring Well • GWA-7S Monitoring Well Type Shallow Northing - 924089.91 Easting 1685204.62 TOC Elevation 822.87 Casing Type PVC Casing Diameter-. 2.0 Casing 2.50 Top. Bottom btoc 30.00 of ft btoc 45.00 Total ft btoc 46.00 Program CAMA GWA-8D Deep 923680.90 1684362.29 831.15 PVC 6.0 2.54 91.54 96.54 99.54 CAMA GWA-8S Shallow 923683.73 1684368.98 832.01 PVC 2.0 3.74 23.74 38.74 42.74 CAMA GWA-9D Deep 924747.11 1681491.82 794.28 PVC 6.0 3.03 86.03 91.03 93.53 CAMA GWA-9S Shallow 924744.66 1681495.09 793.99 PVC 2.0 3.22 39.22 54.22 56.22 CAMA MW-200BR Bedrock 929442.68 1683073.64 636.42 PVC 6.0 2.77 47.77 52.77 53.27 CAMA MW-202BR Bedrock 921469.71 1683338.39 789.63 PVC 6.0 2.76 100.76 105.76 133.26 CAMA MW-203BR Bedrock 925590.65 1681600.82 787.26 PVC 6.0 3.17 97.17 102.17 123.67 CAMA MW-101D Deep 928883.00 1682885.00 674.04 PVC 2.0 3.14 35.44 40.44 40.44 Voluntary MW-101S Shallow 928885.00 1682888.00 674.12 PVC 2.0 2.89 11.44 21.44 21.44 Voluntary MW-102D Deep 928941.00 1683088.00 653.07 PVC 2.0 2.94 24.55 29.55 29.55 Voluntary MW-102S Shallow 928941.00 1683093.00 653.07 PVC 2.0 2.58 9.51 17.51 17.51 Voluntary MW-103D Deep 928999.00 1683538.00 684.25 PVC 2.0 2.86 25.36 32.36 32.36 Voluntary MW-103S Shallow 928996.00 1683535.00 684 PVC 2.0 2.84 11.27 16.27 16.27 Voluntary MW-104D Deep 925787.00 1685668.00 798.34 PVC 2.0 2.51 80.53 85.53 85.53 Voluntary MW-104S Shallow 925787.00 1685673.00 798.68 PVC 2.0 2.55 38.19 48.19 48.19 Voluntary MW-200D Deep 929458.00 1683061.00 636.05 PVC 2.0 2.75 17.25 22.25 22.25 NPDES MW-200S Shallow 929458.70 1683066.00 635.89 PVC 2.0 2.71 7.87 15.47 15.47 NPDES MW-201D Deep 928562.90 1686914.00 783.98 PVC 2.0 2.72 36.86 46.86 46.86 NPDES MW-202D Deep 921477.00 1683327.00 790.78 PVC 2.0 2.91 89.31 94.31 94.31 NPDES MW-202S Shallow 921472.90 1683332.00 789.97 PVC 2.0 2.36 47.37 62.37 62.37 NPDES MW-203D Deep 925588.30 1681612.00 785.57 PVC 2.0 2.20 89.06 94.06 94.06 NPDES MW-203S Shallow 925599.30 1681606.00 786.14 PVC 2.0 2.68 30.19 45.19 45.19 NPDES MW-204D Deep 926744.90 1681145.00 776.78 PVC 2.0 2.86 38.93 43.93 43.93 NPDES MW-204S Shallow 926748.40 1681146.00 776.29 PVC 2.0 2.80 21.74 36.74 36.74 NPDES MW-3 Shallow 923705.6 1683902 842.81 PVC 2.0 2.24 39.24 49.24 50.04 Landfill BC-23A Deep 920562 1689343 863.79 PVC 2.0 1.23 77.44 102.44 102.44 Landfill BC-28 Deep 919788.85 1688743.22 818.09 PVC 2.0 2.07 47.27 62.27 62.27 Landfill CRW-17 Shallow 916254.7708 1685357.839 834.56 PVC 2.0 2.94 31.94 41.94 41.94 Landfill Notes: 1. TOC indicates top of casing 2. TOC elevation based on NAVD 88 vertical datum 3. Northing and Easting based on NAD83 horizontal datum 4. ft indicates measurements in feet 5. btoc indicates measurements below the top of casing 6. NM indicates "not measured"; NR indicates no record 7. Deep and Bedrock CAMA wells installed with 2-inch riser; Casing value listed for D/BR CAMA wells indicates outer casing diameter. Belews Creek Steam Station Page 3 of 3 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: NS NS NS NS 6.5 - 8.5 500 10 250 250 10 Units: °C mV µQ/cm mg/L SU mg/L mg/L mg/L mg/L µg/L Well ID Sample Date Temperature • D• pH (Field) TDS Nitrate Chloride Sulfate Arsenic MW-101S 11/14/2007 14.33 115.5 - 5.63 83 <0.02 7.13 32.41 <2 MW-101S 5/20/2008 14.83 124.2 - 5.51 53 0.02 8.2 54 <2 MW-101S 11/6/2008 14.02 - 490.3 - 5.32 276 <0.02 120 16 3.71 MW-101S 5/5/2009 14.51 - 1034 - 5.05 864 <0.02 290 17 6.58 MW-101S 11/16/2009 13.45 - 1324 - 5.22 916 <0.02 370 26 4 MW-101S 5/18/2010 14.3 1456 - 5.14 931 <0.02 470 37 2.4 MW-101D 11/14/2007 14.04 - 114.6 - 5.43 80 <0.02 7.06 35.99 <2 MW-101D 5/20/2008 14.71 121.7 5.44 14 <0.02 8.5 31 <2 MW-101D 11/6/2008 13.97 - 399.1 5.25 228 0.23 89 17 <2 MW-101D 5/5/2009 14.31 - 890.3 4.9 816 <0.02 270 15 5.08 MW-101D 11/16/2009 13.5 -- 1223 5.11 816 <0.02 340 20 1.1 MW-101D 5/18/2010 14.12 1400 5 933 <0.02 430 23 <1 MW-102S 11/14/2007 14.88 - 71.1 5.73 48 <0.02 7.43 9.41 <2 MW-102S 5/20/2008 14.3 64.8 5.42 <10 <0.02 7.2 8.1 <2 MW-102S 11/6/2008 13.39 - 64.1 5.61 52 <0.02 8.3 6.8 <2 MW-102S 5/5/2009 12.71 82.7 5.17 52 <0.02 13 6.1 <2 MW-102S 11/16/2009 12.72 - 146.1 5.3 138 <0.02 34 3 <1 MW-102S 5/18/2010 13.53 287.9 4.97 174 <0.02 78 2.7 <1 MW-102D 11/14/2007 16.34 - 297.8 - 7.7 197 0.02 6.64 25.3 <2 MW-102D 5/20/2008 15.02 291.4 - 7.43 120 <0.02 6.5 25 <2 MW-102D 11/6/2008 12.34 - 302.3 - 7.31 222 <0.02 23 19 <2 MW-102D 5/5/2009 13.45 547.4 - 7.29 608 <0.02 130 15 <2 MW-102D 11/16/2009 11.78 - 929.3 - 7.48 684 <0.02 200 19 <1 MW-102D 5/18/2010 13.72 - 1156 - 7.36 666 <0.02 310 25 <1 MW-103S 11/14/2007 16.75 - 183.8 - 6.54 79 <0.02 4.93 <0.1 54.71 MW-103S 5/20/2008 14.66 187 - 6.69 10 <0.02 4.7 0.54 48.5 MW-103S 11/6/2008 16.2 - 198 - 6.9 76 <0.02 4.9 0.12 63.6 MW-103S 5/5/2009 13.66 - 189 - 6.59 60 0.02 8.2 8.2 60.5 MW-103S 11/16/2009 15.76 - 180 - 6.99 72 <0.02 8 <0.1 67.5 MW-103S 5/18/2010 14.19 205.9 - 6.73 62 <0.02 12 <0.1 56.7 MW-103D 11/14/2007 16.39 - 57.8 - 5.64 42 0.04 5.22 1.3 3.63 MW-103D 5/20/2008 14.95 56.9 5.71 18 0.03 5.1 1.4 2.39 MW-103D 11/6/2008 15.54 - 68 6.02 58 0.04 5.3 1.4 6.17 MW-103D 5/5/2009 14.32 53 5.54 50 0.05 5.9 2 22.5 MW-103D 11/16/2009 15.36 - 57 5.92 36 0.04 8 1.5 1.6 MW-103D 5/18/2010 14.21 62.9 5.64 33 0.05 10 1.4 1.1 MW-104S 11/14/2007 15.15 - 30.8 5.5 40 0.13 1.03 0.4 <2 MW-104S 5/20/2008 15.28 35.6 5.78 39 0.1 0.94 0.42 <2 MW-104S 5/18/2010 14 - 33 5.5 27 0.07 1.2 0.27 <1 MW-104D 11/14/2007 14.95 - 107 - 6.57 115 0.04 1.22 9.11 <2 MW-104D 5/20/2008 15.16 - 109.2 - 6.68 30 0.05 1.1 4 <2 MW-104D 11/6/2008 14.6 98 - 6.76 122 0.04 0.95 3.9 <2 MW-104D 5/5/2009 14.63 -- 112 - 6.5 104 0.1 1.1 2.1 <2 MW-104D 11/16/2009 14.2 - 89 - 6.72 78 0.07 3.4 2.6 <1 MW-104D 5/18/2010 14.57 -- 117 - 6.74 93 0.1 1.3 1.8 <1 MW-200S 1/6/2011 9.52 - 109.7 - 6.06 52 0.04 4.1 9.2 <1 MW-200S 5/4/2011 13.95 -- 43.2 - 5.18 23 <0.023 3.2 3.4 <1 MW-200S 9/6/2011 19.56 -- 102.5 -- 5.82 160 <0.023 3.9 7.1 5.58 MW-200S 1/9/2012 11.43 331 67.1 2.1 5.71 59 0.03 3.8 4.2 <1 MW-200S 5/9/2012 15.11 415 52 1.18 5.35 70 <0.023 3.1 3.1 1.43 MW-200S 9/5/2012 19.49 344 62 3.21 5.63 93 <0.023 3.9 3.5 1.55 MW-200S 1/8/2013 10.01 398 59 3.47 5.6 56 <0.023 6.1 2.4 <1 MW-200S 5/8/2013 12.98 414 40 3.13 5.39 48 <0.023 3.2 2.9 <1 MW-200S 9/9/2013 18.24 181 90 2.11 5.51 74 <0.023 9.9 2.2 1.61 MW-200S 1/9/2014 9.69 465 43 0.9 5.13 52 <0.023 5.3 1.9 <1 MW-200S 5/6/2014 12.52 274 33 0.14 4.99 36 <0.023 2.9 2.2 <1 Belews Creek Steam Station Page 1 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID NCAC 2L Standard: Units: Sample Date NS °C Temperature NS mV ORP NS 110/cm SpecificD• NS mg/L 6.5 - 8.5 SU pH (Field) 500 mg/L TDS 10 mg/L Nitrate 250 mg/L Chloride 250 mg/L Sulfate 10 µg/L Arsenic MW-200S 9/9/2014 17.75 292 90 2.37 5.64 74 <0.023 11 2 1.86 MW-200S 1/6/2015 10.36 441 42 3.75 5.18 44 <0.023 7.3 4.3 1.55 MW-200S 5/5/2015 12.67 247 119 2.28 5.56 80 <0.023 14 11 1.85 MW-200S 9/10/2015 18.63 275 134 1.66 5.71 110 <0.023 19 4.2 6.04 MW-200S 1/5/2016 12.13 256 87 0 5.03 81 <0.023 12 5.6 1.01 MW-200S 5/25/2016 14.68 242 223 1.39 5.81 180 <0.023 34 6.7 3.2 MW-200D 1/6/2011 13 -- 160.3 -- 6.33 82 0.05 9 4.7 1.76 MW-200D 5/4/2011 12.79 - 140.1 - 6.1 88 0.05 7 4 3.36 MW-200D 9/6/2011 16.41 -- 285.6 -- 6.12 200 0.04 46 3.5 1.76 MW-200D 1/9/2012 13.79 309 257.4 1.56 6.36 150 0.04 36 4 1.56 MW-200D 5/9/2012 13.52 392 221 1.74 6.15 156 0.04 26 3.2 1.92 MW-200D 9/5/2012 16.3 354 518 0.41 6.15 440 <0.023 100 4.1 1.45 MW-200D 1/8/2013 14.07 372 424 1.04 6.45 330 0.03 78 4.2 1.58 MW-200D 5/8/2013 12.88 385 253 1.77 6.2 190 <0.023 36 3.6 4.49 MW-200D 9/9/2013 17.96 242 241 3.66 6.26 160 0.03 28 3.1 3.86 MW-200D 1/9/2014 12.97 444 298 3.4 6.16 220 <0.023 47 3.8 5.23 MW-200D 5/6/2014 12.62 258 194 4.45 6.17 130 <0.023 23 3.1 2.06 MW-200D 9/9/2014 15.23 312 271 2.25 6.22 200 0.02 40 3.1 1.76 MW-200D 1/6/2015 13.61 363 370 1.99 6.31 210 <0.023 71 4.2 1.64 MW-200D 5/5/2015 12.21 310 241 1.21 6.19 160 <0.023 35 4.1 <1 MW-200D 9/10/2015 15.44 334 574 0.67 6.2 510 <0.023 130 6.3 1.17 MW-200D 1/5/2016 14.27 269 336 0 5.95 240 0.02 61 4.4 <1 MW-200D 5/25/2016 13.19 328 288 0 5.94 210 0.03 54 4.4 <1 MW-201D 1/6/2011 13.51 -- 150.2 -- 6.41 100 0.27 3.1 1.7 <1 MW-201D 5/4/2011 14.12 - 129.6 - 5.8 110 0.33 2.7 1.6 <1 MW-201D 9/6/2011 15.71 -- 132.3 -- 6.14 130 0.27 2.5 2.9 <1 MW-201D 1/9/2012 13.58 301 128.2 5.76 6.24 110 0.32 2.5 1.6 <1 MW-201D 5/9/2012 15.11 393 122 5.86 6.05 117 0.25 2.7 1.3 <1 MW-201D 9/5/2012 15.61 357 130 5.68 6.04 140 0.27 2.1 3.5 <1 MW-201D 1/8/2013 14.11 312 325 2.24 6.79 200 0.11 17 8.9 <1 MW-201D 5/9/2013 14.97 363 155 5.73 6.06 140 0.11 9.5 3.2 <1 MW-201D 9/10/2013 16.6 356 147 5.5 6.04 130 0.22 4.5 2.9 <1 MW-201D 1/8/2014 13.84 465 160 4.62 6.1 160 0.22 4 4.2 <1 MW-201D 5/6/2014 15.03 405 147 6.01 6.16 120 0.19 6.7 3.4 <1 MW-201D 9/9/2014 15.48 253 141 6.24 6.23 130 0.12 4.1 1.8 <1 MW-201D 1/6/2015 14.32 382 140 6.26 6.26 100 0.25 3.9 1.7 <1 MW-201D 5/5/2015 14.76 227 99 5.85 6.23 110 0.23 3.2 2.1 <1 MW-201D 9/10/2015 15.91 381 144 6.97 6.14 120 0.22 3.2 1.7 <1 MW-201D 1/5/2016 13.8 391 140 6.69 5.89 140 0.17 5.3 1.7 <1 MW-201D 5/25/2016 15.51 342 128 6.79 6.11 120 0.14 5.4 2.9 <1 MW-202S 1/6/2011 14.24 -- 35 -- 5.6 35 0.03 1.5 0.35 <1 MW-202S 5/4/2011 14.84 - 32 - 5.55 30 0.04 1.4 0.12 <1 MW-202S 9/6/2011 16.79 -- 36 -- 5.26 52 0.04 1.9 1.2 <1 MW-202S 1/9/2012 14.36 341 37 8.37 5.61 35 0.04 1.9 2.4 <1 MW-202S 5/9/2012 15.62 376 36 8.36 5.63 49 0.04 1.7 2.3 <1 MW-202S 9/5/2012 16.09 433 35 8.42 5.54 49 0.04 1.6 2 <1 MW-202S 1/9/2013 14.7 410 36 8.46 5.73 48 0.05 1.6 1.9 <1 MW-202S 5/8/2013 15.38 420 34 8.56 5.58 46 0.05 1.6 1.2 <1 MW-202S 9/9/2013 15.93 379 35 8.39 5.38 45 0.04 1.5 0.97 <1 MW-202S 1/8/2014 14.02 499 35 8.33 5.29 54 0.04 1.5 1 <1 MW-202S 5/6/2014 15.38 434 35 8.5 5.52 42 0.04 1.7 0.94 <1 MW-202S 9/9/2014 15.67 395 35 8.52 5.4 50 0.03 1.7 0.73 <1 MW-202S 1/6/2015 14.86 428 34 8.67 5.48 35 0.03 1.6 0.68 <1 MW-202S 5/5/2015 15.4 386 38 8.44 5.56 37 0.03 1.6 0.58 <1 MW-202S 9/3/2015 16.22 351 34 8.49 5.67 56 0.03 1.5 0.58 <1 MW-202S 1/5/2016 14.8 432 34 8.58 5.56 69 0.04 1.6 0.37 <1 Belews Creek Steam Station Page 2 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: Units: NS °C Well ID MW-202S Sample Date 5/25/2016 Temperature 15.39 MW-202D 1/6/2011 14.46 MW-202D 5/4/2011 14.66 MW-202D 9/6/2011 16.95 MW-202D 1/9/2012 14.34 MW-202D 5/9/2012 15.28 MW-202D 9/5/2012 16.16 MW-202D 1/9/2013 14.52 MW-202D 5/8/2013 15.26 MW-202D 9/9/2013 17.71 MW-202D 1/8/2014 13.46 MW-202D 5/6/2014 15.32 MW-202D 9/9/2014 16.29 MW-202D 1/6/2015 13.18 MW-202D 5/5/2015 15.25 MW-202D 9/3/2015 17.01 MW-202D 1/5/2016 14.09 MW-202D 5/25/2016 15.89 MW-203S 1/6/2011 13.57 MW-203S 5/4/2011 14.83 MW-203S 9/6/2011 16.58 MW-203S 1/9/2012 13.86 MW-203S 5/9/2012 15.21 MW-203S 9/5/2012 16.49 MW-203S 1/9/2013 14.61 MW-203S 5/9/2013 14.74 MW-203S 9/10/2013 16.31 MW-203S 1/8/2014 13.85 MW-203S 5/6/2014 15.33 MW-203S 9/9/2014 15.27 MW-203S 1/6/2015 13.95 MW-203S 5/5/2015 15.18 MW-203S 9/3/2015 15.4 MW-203S 1/5/2016 14.18 MW-203S 5/25/2016 15.27 MW-203D 1/6/2011 13.73 MW-203D 5/4/2011 14.83 MW-203D 9/6/2011 15.56 MW-203D 1/9/2012 14.17 MW-203D 5/9/2012 14.98 MW-203D 9/5/2012 16.08 MW-203D 1/9/2013 14.6 MW-203D 5/9/2013 14.6 MW-203D 9/10/2013 15.97 MW-203D 1/8/2014 13.34 MW-203D 5/6/2014 14.92 MW-203D 9/9/2014 15.29 MW-203D 1/6/2015 13.88 MW-203D 5/5/2015 15.01 MW-203D 9/3/2015 16.12 MW-203D 1/5/2016 13.74 MW-203D 5/25/2016 15.21 MW-204D 1/6/2011 13.57 MW-204D 5/4/2011 14.45 MW-204D 9/6/2011 15.87 MW-204D 1/9/2012 13.35 NS NS NS 6.5 - 8.5 500 10 250 250 10 mV 110/cm mg/L SU mg/L mg/L mg/L mg/L µg/L SpecificRP D•TDS Nitrate Chloride Sulfate Arsenic 370 38 8.6 5.63 52 0.04 1.5 0.42 <1 -- 111 -- 6.3 113 0.1 3.3 8.2 <1 - 84 - 6.15 60 0.08 2.3 5.9 <1 -- 65 -- 5.79 97 0.1 2.4 3.5 <1 325 65 7.51 6.11 82 0.1 2.4 3.8 <1 372 64 7.75 6.08 78 0.11 2.3 2.7 <1 439 62 7.89 5.94 78 0.12 2.2 2.3 <1 408 63 8.05 6.12 71 0.11 2.3 2.1 <1 395 63 7.49 5.97 79 0.12 2.5 2.1 <1 375 65 7.15 5.64 70 0.1 2.3 1.9 <1 498 63 6.87 5.67 82 0.11 2.3 1.8 <1 372 66 6.38 5.83 67 0.11 2.7 2.1 <1 346 69 5.41 5.69 80 0.11 2.4 1.9 <1 402 67 6.92 5.85 64 0.14 2.7 1.9 <1 369 74 6.79 5.74 72 0.13 2.5 1.8 <1 334 71 7.7 6.03 93 0.14 2.5 1.6 <1 425 70 7.4 5.82 91 0.16 2.7 1.6 <1 360 75 7.6 5.97 84 0.17 2.6 1.8 <1 -- 35 -- 5.52 <25 0.32 2.1 0.55 <1 - 34 - 5.62 17 0.35 2.1 0.16 <1 -- 30 -- 5.35 39 0.27 2.4 0.17 <1 354 34 7.75 5.73 20 0.37 1.9 0.14 <1 399 32 7.84 5.65 40 0.33 2 0.14 <1 469 29 7.73 5.47 37 0.32 2 0.15 <1 428 31 8.01 5.71 29 0.34 2 0.14 <1 423 33 8.26 5.62 37 0.35 1.9 0.23 <1 357 31 8.1 5.4 34 0.28 2 0.13 <1 466 33 8.17 5.56 41 0.28 1.7 0.12 <1 441 31 8.55 5.67 29 0.29 2 <0.1 <1 377 29 8.26 5.3 36 0.22 2.1 0.14 <1 439 30 8.59 5.54 27 0.25 1.9 0.14 <1 392 33 8.56 5.46 27 0.2 1.8 0.1 <1 348 28 8.3 5.53 49 0.17 1.9 0.12 <1 478 30 9.02 5.52 50 0.19 1.8 <0.1 <1 382 32 8.51 5.47 31 0.18 1.9 0.15 <1 -- 107 -- 6.36 85 0.5 1.8 2.4 <1 - 106 - 6.46 79 0.52 1.6 2.2 <1 -- 104 -- 6.3 100 0.5 1.6 2 <1 317 103 5.53 6.56 88 0.46 1.7 1.8 <1 364 105 5.46 6.55 107 0.43 1.6 1.9 <1 391 104 5.77 6.4 100 0.46 1.5 2.1 <1 385 106 5.37 6.53 98 0.44 1.6 1.8 <1 379 107 5.23 6.44 110 0.44 1.9 1.7 <1 309 105 5.6 6.3 99 0.44 1.7 1.4 <1 440 103 5.44 6.34 110 0.44 1.6 1.6 <1 351 105 5.55 6.38 95 0.48 2 1.6 <1 295 102 6.67 6.35 110 0.45 1.8 1.3 <1 381 104 5.74 6.42 91 0.48 1.9 1.7 <1 328 114 5.76 6.41 92 0.4 2.1 2.7 <1 307 99 6.79 6.48 120 0.39 1.9 1.4 <1 410 104 6.16 6.37 99 0.39 3.1 1.3 <1 323 93 8.36 6.49 100 0.32 1.9 1.3 <1 -- 93.4 -- 6.11 56 0.06 1.3 16 <1 - 80.3 - 5.76 53 0.05 1.1 12 <1 -- 63.8 -- 5.79 52 0.05 1.1 8.4 <1 303 53.6 5.19 5.79 31 0.06 1.1 6.2 <1 Belews Creek Steam Station Page 3 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: NS NS NS NS 6.5 - 8.5 500 10 250 250 10 Units: °C mV 110/cm mg/L SU mg/L mg/L mg/L mg/L µg/L Well ID Sample Date Temperature ORP SpecificD•Ch loride Sulfate Arsenic MW-204D 5/9/2012 15.13 357 51 5.72 5.6 50 0.06 1.1 5.4 <1 MW-204D 9/5/2012 16.15 346 56 6.5 5.57 46 0.06 0.9 6 <1 MW-204D 1/8/2013 13.6 349 77 7.15 5.73 58 0.21 1.7 10 <1 MW-204D 5/9/2013 15.05 330 64 4.56 5.45 54 0.14 1.7 7.8 <1 MW-204D 9/10/2013 15.87 282 78 5.7 5.59 54 0.06 1.2 8.7 <1 MW-204D 1/9/2014 13.23 383 62 6.72 5.55 54 0.17 1.6 6.3 <1 MW-204D 5/6/2014 15.2 371 43 4.89 5.45 35 0.07 1.4 3.9 <1 MW-204D 9/9/2014 15.17 352 44 6.74 5.5 48 0.04 1 3.9 <1 MW-204D 1/6/2015 12.33 349 53 6.14 5.77 37 0.04 1.1 5.8 <1 MW-204D 5/5/2015 14.58 315 51 7.4 5.69 42 <0.023 1 6.4 <1 MW-204D 9/3/2015 15.17 356 36 5.36 5.47 28 0.05 1.1 3 <1 MW-204D 1/5/2016 14.09 343 39 5.34 5.22 64 0.08 1.4 3 <1 MW-204D 5/25/2016 14.78 355 36 5.45 5.46 45 0.07 1.1 2.7 <1 MW-204S 1/6/2011 13.76 -- 149.8 -- 6.32 86 0.12 2.8 2.6 <1 MW-204S 5/4/2011 14.53 -- 138.7 -- 5.97 72 0.15 2.6 2.4 <1 MW-204S 9/6/2011 15.96 -- 114.4 -- 5.98 80 0.08 2.1 2.3 <1 MW-204S 1/9/2012 13.54 144 101.9 1.95 6.06 59 0.12 2.6 2.3 <1 MW-204S 5/9/2012 14.99 235 85 1.88 5.83 71 0.08 2.1 2.4 <1 MW-204S 9/5/2012 15.75 222 80 1.99 5.73 59 0.1 1.6 2.5 <1 MW-204S 1/8/2013 14 279 83 2.23 5.88 58 0.22 2.5 2.3 <1 MW-204S 5/9/2013 14.99 277 78 2.02 5.6 65 0.25 2.8 3.7 <1 MW-204S 9/10/2013 15.58 260 66 2.21 5.46 54 0.23 2 3.8 <1 MW-204S 1/9/2014 13.77 318 68 2.79 5.58 55 0.24 2.5 3 <1 MW-204S 5/6/2014 14.84 223 59 2.6 5.52 44 0.35 2.4 3.7 <1 MW-204S 9/9/2014 15.13 225 59 2.34 5.77 58 0.07 1.8 4.5 <1 MW-204S 1/6/2015 14.31 277 64 2.54 5.72 45 0.15 2.1 4.1 <1 MW-204S 5/5/2015 14.61 165 67 1.92 5.57 49 0.07 1.7 3.7 <1 MW-204S 9/3/2015 15.12 275 52 2.87 5.32 51 0.15 1.9 3.6 <1 MW-204S 1/5/2016 13.97 275 51 3.5 5.3 67 0.23 2.1 3.4 <1 MW-204S 5/25/2016 14.73 278 47 3.45 5.53 49 0.39 2 3.2 <1 Notes: 1. °C indicates temperature measured in degrees celsius 2. mV indicates oxidation/reduction potential measured in millivolts 3. µf2/cm indicates specific conductivity measured in micromhos per centimeter 4. mg/L indicates concentrations measured in milligrams per liter 5. µg/L indicates concentrations measured in micrograms per liter 6. SU indicates pH values measured in standard units 7. NTU indicates turbidity values measured in Nephalometric Turbidity Units 8. Parameters are compared to standards found in 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina 9. 2L Standards are established as part of 15A NCAC 02L .0202 10. Interim Maximum Allowable Concentrations (IMACs) can be found in Appendix #1 of 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina Belews Creek Steam Station Page 4 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 700 700 2 10 1 300 15 50 0.2 100 Units: µg/L µg/L µg/L µg/L mg/L µg/L µg/L µg/L µg/L µg/L Well ID Sample Date Barium Boron MW-101S 11/14/2007 30 244 <0.5 <1 <0.002 723 <2 559 <2 MW-101S 5/20/2008 34 260 <0.5 <1 <0.002 604 <2 616 <2 MW-101S 11/6/2008 133 538 <0.5 <1 <0.002 2230 <2 2850 2.7 MW-101S 5/5/2009 279 1700 0.72 1.56 0.003 2550 2.42 6200 5.1 MW-101S 11/16/2009 298 4310 <1 <1 0.002 1550 1.6 7170 4.3 MW-101S 5/18/2010 305 5390 <1 <1 <0.001 1190 <1 7190 4.4 MW-101D 11/14/2007 34 241 <0.5 <1 <0.002 425 <2 494 <2 MW-101D 5/20/2008 37 273 <0.5 <1 <0.002 311 <2 546 <2 MW-101D 11/6/2008 115 400 <0.5 <1 <0.002 32 <2 2190 2.8 MW-101D 5/5/2009 281 1270 1.23 2.02 0.002 1280 <2 5500 6.9 MW-101D 11/16/2009 340 3390 <1 <1 <0.001 46.5 <1 7260 5.9 MW-101D 5/18/2010 362 4550 <1 <1 <0.001 11.7 <1 7580 5.8 MW-102S 11/14/2007 12 237 <0.5 <1 <0.002 1581 <2 1856 2 MW-102S 5/20/2008 13 230 <0.5 <1 <0.002 705 <2 1740 <2 MW-102S 11/6/2008 11 190 <0.5 <1 <0.002 646 <2 1620 <2 MW-102S 5/5/2009 15 230 <0.5 <1 <0.002 989 <2 2360 <2 MW-102S 11/16/2009 28.3 215 <1 <1 <0.001 1080 <1 5170 2.6 MW-102S 5/18/2010 57.2 268 <1 <1 <0.001 1060 <1 12500 5.3 MW-102D 11/14/2007 6 223 <0.5 <1 <0.002 178 <2 57 <2 MW-102D 5/20/2008 6 224 <0.5 <1 0.003 39 <2 53 <2 MW-102D 11/6/2008 <5 232 <0.5 <1 0.004 59 2.97 61 <2 MW-102D 5/5/2009 8 425 <0.5 <1 0.003 58 <2 79 <2 MW-102D 11/16/2009 <5 1290 <1 <1 0.002 224 1.3 171 <1 MW-102D 5/18/2010 <5 2340 <1 1.7 0.001 214 <1 309 5.2 MW-103S 11/14/2007 8 <100 <0.5 <1 <0.002 42403 <2 2304 <2 MW-103S 5/20/2008 8 <100 <0.5 <1 <0.002 46500 <2 2470 <2 MW-103S 11/6/2008 7 <100 <0.5 <1 <0.002 44600 <2 2340 <2 MW-103S 5/5/2009 8 <100 <0.5 <1 <0.002 46600 <2 2350 <2 MW-103S 11/16/2009 6.3 81.2 <1 <1 <0.001 46100 <1 2410 <1 MW-103S 5/18/2010 8.65 73.7 <1 <1 <0.001 48100 <1 2370 <1 MW-103D 11/14/2007 16 <100 <0.5 <1 <0.002 2055 <2 1803 4.1 MW-103D 5/20/2008 14 <100 <0.5 <1 <0.002 1650 <2 1700 4.3 MW-103D 11/6/2008 15 <100 <0.5 <1 <0.002 4080 <2 1930 4.2 MW-103D 5/5/2009 15 <100 <0.5 <1 0.002 14000 <2 1120 2.8 MW-103D 11/16/2009 14.6 105 <1 <1 <0.001 1190 <1 1530 3.9 MW-103D 5/18/2010 15.6 86.9 <1 <1 <0.001 900 <1 1080 2.6 MW-104S 11/14/2007 57 <100 <0.5 <1 <0.002 26 <2 23 <2 MW-104S 5/20/2008 61 <100 <0.5 <1 <0.002 100 <2 14 <2 MW-104S 5/18/2010 60.9 <50 <1 <1 0.001 43.6 <1 <5 <1 MW-104D 11/14/2007 44 <100 <0.5 3.03 0.003 2697 <2 162 <2 MW-104D 5/20/2008 29 <100 <0.5 1.64 <0.002 1160 <2 108 <2 MW-104D 11/6/2008 20 <100 <0.5 1.87 <0.002 960 <2 68 <2 MW-104D 5/5/2009 17 <100 <0.5 1.3 <0.002 262 <2 30 <2 MW-104D 11/16/2009 14.8 <50 <1 1.1 <0.001 362 <1 22.3 <1 MW-104D 5/18/2010 11.9 <50 <1 <1 <0.001 30 <1 <5 -- <1 MW-200S 1/6/2011 31 <50 <1 <5 <0.005 189 <1 497 <0.2 <5 MW-200S 5/4/2011 14 <50 <1 <5 <0.005 506 <1 872 <0.2 <5 MW-200S 9/6/2011 31 <50 <1 <5 <0.005 3540 2.54 1300 <0.2 <5 MW-200S 1/9/2012 15 <50 <1 <5 <0.005 440 <1 248 <0.2 <5 MW-200S 5/9/2012 15 <50 <1 <5 <0.005 688 <1 306 <0.2 <5 MW-200S 9/5/2012 11 <50 <1 <5 <0.005 907 1.16 321 <0.2 <5 MW-200S 1/8/2013 9 <50 <1 <5 <0.005 284 <1 470 <0.2 <5 MW-200S 5/8/2013 10 <50 <1 <5 <0.005 282 <1 338 <0.2 <5 MW-200S 9/9/2013 14 <50 <1 <5 <0.005 1110 <1 435 <0.2 <5 MW-200S 1/9/2014 13 <50 <1 <5 <0.005 685 <1 68 <0.2 <5 MW-200S 5/6/2014 11 <50 <1 <5 <0.005 754 <1 157 <0.2 <5 Belews Creek Steam Station Page 5 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 700 700 2 10 1 300 15 50 0.2 100 Units: µg/L µg/L µg/L µg/L mg/L µg/L µg/L µg/L µg/L µg/L Well ID Sample Date Boron Cadmium Chromium Copper MW-200S 9/9/2014 10 <50 <1 <5 <0.005 755 <1 445 <0.2 <5 MW-200S 1/6/2015 15 <50 <1 <5 <0.005 1000 <1 376 <0.2 <5 MW-200S 5/5/2015 26 <50 <1 <5 <0.005 434 <1 686 0.356 <5 MW-200S 9/10/2015 26 <50 <1 <5 <0.005 3270 <1 1220 <0.2 <5 MW-200S 1/5/2016 45 <50 <1 <5 <0.005 843 <1 284 <0.2 <5 MW-200S 5/25/2016 50 63 <1 <5 <0.005 1800 <1 813 <0.2 <5 MW-200D 1/6/2011 <5 <50 <1 <5 <0.005 271 <1 110 <0.2 <5 MW-200D 5/4/2011 <5 <50 <1 <5 <0.005 1160 <1 83 <0.2 <5 MW-200D 9/6/2011 6 75 <1 <5 <0.005 280 <1 13 <0.2 <5 MW-200D 1/9/2012 5 108 <1 <5 <0.005 182 <1 39 <0.2 <5 MW-200D 5/9/2012 <5 86 <1 <5 <0.005 310 <1 14 <0.2 <5 MW-200D 9/5/2012 7 422 <1 <5 <0.005 151 <1 20 <0.2 <5 MW-200D 1/8/2013 6 408 <1 <5 <0.005 259 <1 32 <0.2 <5 MW-200D 5/8/2013 5 163 <1 <5 <0.005 1060 <1 96 <0.2 <5 MW-200D 9/9/2013 <5 118 <1 <5 <0.005 679 <1 22 <0.2 <5 MW-200D 1/9/2014 7 268 <1 <5 <0.005 1240 <1 95 <0.2 <5 MW-200D 5/6/2014 <5 96 <1 <5 <0.005 450 <1 24 <0.2 <5 MW-200D 9/9/2014 <5 191 <1 <5 <0.005 290 <1 9 <0.2 <5 MW-200D 1/6/2015 6 483 <1 <5 <0.005 166 <1 15 <0.2 <5 MW-200D 5/5/2015 5 203 <1 <5 <0.005 20 <1 23 <0.2 <5 MW-200D 9/10/2015 7 1060 <1 <5 <0.005 84 <1 10 0.348 <5 MW-200D 1/5/2016 <5 427 <1 <5 <0.005 22 <1 15 <0.2 <5 MW-200D 5/25/2016 <5 285 <1 <5 <0.005 19 <1 38 <0.2 <5 MW-201D 1/6/2011 17 <50 <1 <5 <0.005 335 <1 101 <0.2 <5 MW-201D 5/4/2011 12 <50 <1 <5 <0.005 668 <1 53 <0.2 <5 MW-201D 9/6/2011 11 <50 <1 <5 <0.005 408 <1 35 <0.2 <5 MW-201D 1/9/2012 12 <50 <1 <5 <0.005 893 <1 48 <0.2 <5 MW-201D 5/9/2012 7 <50 <1 <5 <0.005 208 <1 13 <0.2 <5 MW-201D 9/5/2012 11 <50 <1 <5 <0.005 820 <1 24 0.207 <5 MW-201D 1/8/2013 10 94 <1 <5 <0.005 169 <1 28 <0.2 <5 MW-201D 5/9/2013 6 <50 <1 <5 <0.005 158 <1 13 <0.2 <5 MW-201D 9/10/2013 7 <50 <1 <5 <0.005 273 <1 13 <0.2 <5 MW-201D 1/8/2014 13 <50 <1 <5 <0.005 1790 1.15 35 <0.2 <5 MW-201D 5/6/2014 7 <50 <1 <5 <0.005 236 <1 8 <0.2 <5 MW-201D 9/9/2014 9 <50 <1 <5 <0.005 1100 <1 20 <0.2 <5 MW-201D 1/6/2015 10 <50 <1 6 <0.005 1560 <1 31 <0.2 <5 MW-201D 5/5/2015 7 <50 <1 <5 <0.005 469 <1 9 <0.2 <5 MW-201D 9/10/2015 8 <50 <1 7 <0.005 942 <1 15 <0.2 <5 MW-201D 1/5/2016 6 <50 <1 <5 <0.005 330 <1 7 <0.2 <5 MW-201D 5/25/2016 7 <50 <1 5 <0.005 859 <1 22 <0.2 <5 MW-202S 1/6/2011 23 <50 <1 <5 <0.005 69 <1 26 <0.2 <5 MW-202S 5/4/2011 21 <50 <1 <5 <0.005 81 <1 18 <0.2 <5 MW-202S 9/6/2011 24 <50 <1 <5 <0.005 40 <1 11 <0.2 <5 MW-202S 1/9/2012 24 <50 <1 <5 <0.005 31 <1 9 <0.2 <5 MW-202S 5/9/2012 25 <50 <1 <5 <0.005 113 <1 9 <0.2 <5 MW-202S 9/5/2012 23 <50 <1 <5 <0.005 51 <1 5 <0.2 <5 MW-202S 1/9/2013 24 <50 <1 <5 <0.005 64 <1 <5 <0.2 <5 MW-202S 5/8/2013 21 <50 <1 8 <0.005 73 <1 <5 <0.2 <5 MW-202S 9/9/2013 22 <50 <1 <5 <0.005 53 <1 <5 <0.2 <5 MW-202S 1/8/2014 22 <50 <1 <5 <0.005 72 <1 <5 <0.2 <5 MW-202S 5/6/2014 21 <50 <1 <5 <0.005 32 <1 <5 <0.2 <5 MW-202S 9/9/2014 22 <50 <1 <5 <0.005 25 <1 <5 <0.2 <5 MW-202S 1/6/2015 22 <50 <1 <5 <0.005 35 <1 <5 <0.2 <5 MW-202S 5/5/2015 22 <50 <1 <5 <0.005 22 <1 <5 <0.2 <5 MW-202S 9/3/2015 24 <50 <1 <5 <0.005 154 <1 <5 <0.2 <5 MW-202S 1/5/2016 23 <50 <1 <5 <0.005 365 <1 8 <0.2 <5 Belews Creek Steam Station Page 6 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID MW-202S NCAC 2L Standard: Units: Sample Date 5/25/2016 700 µg/L Barium 22 700 µg/L Boron <50 2 µg/L Cadmium <1 10 µg/L Chromium <5 1 mg/L Copper <0.005 300 µg/L Iron 46 15 µg/L Lead <1 50 µg/L Manganese <5 0.2 µg/L Thallium <0.2 100 µg/L Nickel <5 MW-202D 1/6/2011 78 <50 <1 15 0.008 7280 7.52 413 <0.2 6 MW-202D 5/4/2011 8 <50 <1 <5 <0.005 223 <1 62 <0.2 <5 MW-202D 9/6/2011 12 <50 <1 <5 <0.005 707 1.15 43 <0.2 <5 MW-202D 1/9/2012 11 <50 <1 <5 <0.005 850 1.11 37 <0.2 <5 MW-202D 5/9/2012 6 <50 <1 <5 <0.005 131 <1 12 <0.2 <5 MW-202D 9/5/2012 7 <50 <1 <5 <0.005 260 <1 14 <0.2 <5 MW-202D 1/9/2013 6 <50 <1 <5 <0.005 114 <1 5 <0.2 <5 MW-202D 5/8/2013 5 <50 <1 <5 <0.005 76 <1 <5 <0.2 <5 MW-202D 9/9/2013 5 <50 <1 <5 <0.005 113 <1 <5 <0.2 <5 MW-202D 1/8/2014 7 <50 <1 <5 <0.005 350 <1 7 <0.2 <5 MW-202D 5/6/2014 6 <50 <1 <5 <0.005 43 <1 <5 <0.2 <5 MW-202D 9/9/2014 9 <50 <1 <5 <0.005 64 <1 <5 <0.2 <5 MW-202D 1/6/2015 6 <50 <1 <5 <0.005 17 <1 <5 <0.2 <5 MW-202D 5/5/2015 6 <50 <1 <5 <0.005 35 <1 <5 <0.2 <5 MW-202D 9/3/2015 9 <50 <1 <5 <0.005 802 <1 13 <0.2 <5 MW-202D 1/5/2016 6 <50 <1 <5 <0.005 196 <1 <5 <0.2 <5 MW-202D 5/25/2016 5 <50 <1 <5 <0.005 31 <1 <5 <0.2 <5 MW-203S 1/6/2011 48 <50 <1 <5 <0.005 <10 <1 37 <0.2 <5 MW-203S 5/4/2011 50 <50 <1 <5 <0.005 <10 <1 40 <0.2 <5 MW-203S 9/6/2011 55 <50 <1 <5 <0.005 13 <1 16 <0.2 <5 MW-203S 1/9/2012 53 <50 <1 <5 <0.005 14 <1 46 <0.2 <5 MW-203S 5/9/2012 51 <50 <1 <5 <0.005 <10 <1 10 <0.2 <5 MW-203S 9/5/2012 55 <50 <1 <5 <0.005 <10 <1 5 <0.2 <5 MW-203S 1/9/2013 52 <50 <1 <5 <0.005 17 <1 12 <0.2 <5 MW-203S 5/9/2013 51 <50 <1 <5 <0.005 <10 <1 8 <0.2 <5 MW-203S 9/10/2013 55 <50 <1 <5 <0.005 11 <1 <5 <0.2 <5 MW-203S 1/8/2014 54 <50 <1 <5 <0.005 24 <1 16 <0.2 <5 MW-203S 5/6/2014 52 <50 <1 <5 <0.005 <10 <1 9 <0.2 <5 MW-203S 9/9/2014 49 <50 <1 <5 <0.005 <10 <1 <5 <0.2 <5 MW-203S 1/6/2015 50 <50 <1 <5 <0.005 <10 <1 <5 <0.2 <5 MW-203S 5/5/2015 52 <50 <1 <5 <0.005 <10 <1 <5 <0.2 <5 MW-203S 9/3/2015 49 <50 <1 <5 <0.005 30 <1 <5 <0.2 <5 MW-203S 1/5/2016 51 <50 <1 <5 <0.005 29 <1 13 <0.2 <5 MW-203S 5/25/2016 49 <50 <1 <5 <0.005 <10 <1 <5 <0.2 <5 MW-203D 1/6/2011 7 <50 <1 <5 <0.005 108 <1 15 <0.2 <5 MW-203D 5/4/2011 6 <50 <1 <5 <0.005 37 <1 <5 <0.2 <5 MW-203D 9/6/2011 7 <50 <1 <5 <0.005 <10 <1 <5 <0.2 <5 MW-203D 1/9/2012 6 <50 <1 <5 <0.005 42 <1 <5 <0.2 <5 MW-203D 5/9/2012 7 <50 <1 <5 <0.005 19 <1 <5 <0.2 <5 MW-203D 9/5/2012 7 <50 <1 <5 <0.005 <10 <1 10 <0.2 <5 MW-203D 1/9/2013 7 <50 <1 <5 <0.005 16 <1 <5 <0.2 <5 MW-203D 5/9/2013 6 <50 <1 <5 <0.005 41 <1 <5 <0.2 <5 MW-203D 9/10/2013 7 <50 <1 <5 <0.005 95 <1 6 <0.2 <5 MW-203D 1/8/2014 7 <50 <1 <5 <0.005 191 <1 10 <0.2 <5 MW-203D 5/6/2014 7 <50 <1 <5 <0.005 131 <1 8 <0.2 <5 MW-203D 9/9/2014 8 <50 <1 <5 <0.005 89 <1 <5 <0.2 <5 MW-203D 1/6/2015 6 <50 <1 <5 <0.005 35 <1 <5 <0.2 <5 MW-203D 5/5/2015 8 <50 <1 <5 <0.005 126 <1 6 <0.2 <5 MW-203D 9/3/2015 11 <50 <1 <5 <0.005 558 <1 18 <0.2 <5 MW-203D MW-203D MW-204D MW-204D MW-204D MW-204D 1/5/2016 5/25/2016 1/6/2011 5/4/2011 9/6/2011 1/9/2012 8 8 45 41 43 38 <50 <50 <50 <50 <50 <50 <1 <1 <1 <1 <1 <1 <5 <5 <5 <5 <5 <5 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 139 80 345 867 1090 480 <1 <1 <1 <1 <1 <1 <5 <5 1130 776 775 394 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <5 <5 <5 <5 <5 <5 Belews Creek Steam Station Page 7 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 700 700 2 10 1 300 15 50 02 100 Units: µg/L µg/L µg/L µg/L mg/L µg/L µg/L µg/L µg/L µg/L Well ID Sample Date Barium Boron Cadmium Chromium Copper Iron Lead Manganese Thallium Nickel MW-204D 5/9/2012 39 <50 <1 <5 <0.005 1350 <1 453 <0.2 <5 MW-204D 9/5/2012 37 <50 <1 <5 <0.005 454 <1 556 <0.2 <5 MW-204D 1/8/2013 50 <50 <1 <5 <0.005 644 <1 671 <0.2 <5 MW-204D 5/9/2013 45 <50 <1 <5 <0.005 391 <1 325 <0.2 <5 MW-204D 9/10/2013 42 <50 <1 <5 <0.005 466 <1 562 <0.2 <5 MW-204D 1/9/2014 43 <50 <1 <5 <0.005 1030 <1 412 <0.2 <5 MW-204D 5/6/2014 35 <50 <1 <5 <0.005 194 <1 175 <0.2 <5 MW-204D 9/9/2014 30 <50 <1 <5 <0.005 141 <1 283 <0.2 <5 MW-204D 1/6/2015 35 <50 <1 <5 <0.005 713 <1 212 <0.2 <5 MW-204D 5/5/2015 35 <50 <1 <5 <0.005 377 <1 326 <0.2 <5 MW-204D 9/3/2015 36 <50 <1 <5 <0.005 196 <1 81 <0.2 <5 MW-204D 1/5/2016 38 <50 <1 <5 <0.005 313 <1 77 <0.2 <5 MW-204D 5/25/2016 36 <50 <1 <5 <0.005 194 <1 85 <0.2 <5 MW-204S 1/6/2011 229 <50 <1 <5 <0.005 7870 <1 3600 <0.2 <5 MW-204S 5/4/2011 227 <50 <1 <5 <0.005 14100 <1 2850 <0.2 <5 MW-204S 9/6/2011 202 <50 <1 <5 <0.005 10200 <1 2130 <0.2 <5 MW-204S 1/9/2012 194 <50 <1 <5 <0.005 8850 <1 2020 <0.2 <5 MW-204S 5/9/2012 184 <50 <1 <5 <0.005 7300 <1 1650 <0.2 <5 MW-204S 9/5/2012 183 <50 <1 <5 <0.005 6410 <1 1520 <0.2 <5 MW-204S 1/8/2013 188 <50 <1 <5 <0.005 6880 <1 1540 <0.2 <5 MW-204S 5/9/2013 200 <50 <1 <5 <0.005 5620 <1 1280 <0.2 6 MW-204S 9/10/2013 205 <50 <1 <5 <0.005 4260 <1 997 <0.2 6 MW-204S 1/9/2014 185 <50 <1 <5 <0.005 4130 <1 1100 <0.2 6 MW-204S 5/6/2014 204 <50 <1 <5 <0.005 3230 <1 748 <0.2 6 MW-204S 9/9/2014 163 <50 <1 <5 <0.005 3680 <1 760 <0.2 <5 MW-204S 1/6/2015 164 <50 <1 <5 <0.005 4220 <1 892 <0.2 5 MW-204S 5/5/2015 165 <50 <1 <5 <0.005 5580 <1 844 <0.2 <5 MW-204S 9/3/2015 140 <50 <1 <5 <0.005 2640 <1 567 <0.2 <5 MW-204S 1/5/2016 149 <50 <1 <5 <0.005 3530 <1 547 <0.2 <5 MW-204S 5/25/2016 164 <50 <1 <5 <0.005 1900 <1 315 <0.2 <5 Notes: 1. °C indicates temperature measured in degrees celsius 2. mV indicates oxidation/reduction potential measured in millivolts 3. µQ/cm indicates specific conductivity measured in micromhos per centimeter 4. mg/L indicates concentrations measured in milligrams per liter 5. µg/L indicates concentrations measured in micrograms per liter 6. SU indicates pH values measured in standard units 7. NTU indicates turbidity values measured in Nephalometric Turbidity Units 8. Parameters are compared to standards found in 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina 9. 2L Standards are established as part of 15A NCAC 02L .0202 10. Interim Maximum Allowable Concentrations (IMACs) can be found in Appendix #1 of 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina Belews Creek Steam Station Page 8 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID MW-101S NCAC 2L Standard: Units: Sample Date 11/14/2007 1 mg/L Zinc <0.005 1 µg/L Antimony* - 20 µg/L Selenium <2 1 µg/L Mercury <0.1 NS NTU Turbidity (Field) 9.67 MW-101S 5/20/2008 <0.005 <2 <0.05 55 MW-101S 11/6/2008 0.007 - 2.28 <0.05 67.3 MW-101S 5/5/2009 0.009 5.52 <0.05 99.1 MW-101S 11/16/2009 0.009 - <1 <0.05 74.2 MW-101S 5/18/2010 0.007 <1 <0.05 14.1 MW-101D 11/14/2007 <0.005 - <2 <0.1 11.6 MW-101D 5/20/2008 <0.005 - <2 <0.05 30.5 MW-101D 11/6/2008 <0.005 - <2 <0.05 3.21 MW-101D 5/5/2009 0.009 - 4.5 <0.05 38.3 MW-101D 11/16/2009 0.009 - <1 <0.05 3.6 MW-101D 5/18/2010 0.01 <1 0.05 0.86 MW-102S 11/14/2007 <0.005 - <2 <0.1 9.6 MW-102S 5/20/2008 0.005 <2 <0.05 5.82 MW-102S 11/6/2008 <0.005 - <2 <0.05 2.32 MW-102S 5/5/2009 0.005 <2 <0.05 6.07 MW-102S 11/16/2009 0.005 - <1 <0.05 2.78 MW-102S 5/18/2010 0.016 - <1 <0.05 1.47 MW-102D 11/14/2007 0.006 -- <2 <0.1 10.1 MW-102D 5/20/2008 0.013 - <2 <0.05 8.39 MW-102D 11/6/2008 0.583 -- <2 <0.05 4.54 MW-102D 5/5/2009 0.01 - 2.65 <0.05 3.91 MW-102D 11/16/2009 <0.005 -- <1 <0.05 3.71 MW-102D 5/18/2010 <0.005 - <1 <0.05 2.78 MW-103S 11/14/2007 0.006 -- <2 <0.1 4.89 MW-103S 5/20/2008 0.008 - <2 <0.05 5 MW-103S 11/6/2008 0.05 - <2 <0.05 3.58 MW-103S 5/5/2009 0.007 <2 <0.05 5.23 MW-103S 11/16/2009 <0.005 -- <1 <0.05 2.41 MW-103S 5/18/2010 <0.005 <1 <0.05 2.71 MW-103D 11/14/2007 <0.005 -- <2 <0.1 16 MW-103D 5/20/2008 <0.005 <2 <0.05 23.2 MW-103D 11/6/2008 0.011 - <2 <0.05 278 MW-103D 5/5/2009 <0.005 <2 <0.05 163 MW-103D 11/16/2009 <0.005 - <1 <0.05 22.9 MW-103D 5/18/2010 <0.005 <1 <0.05 2.22 MW-104S 11/14/2007 0.008 - <2 <0.1 16.9 MW-104S 5/20/2008 0.006 <2 <0.05 18.5 MW-104S 5/18/2010 <0.005 - <1 <0.05 5.34 MW-104D 11/14/2007 0.009 <2 <0.1 88.2 MW-104D 5/20/2008 0.006 - <2 <0.05 33.3 MW-104D 11/6/2008 0.007 - <2 <0.05 52.5 MW-104D 5/5/2009 <0.005 -- <2 <0.05 13.2 MW-104D 11/16/2009 <0.005 - <1 <0.05 20.4 MW-104D 5/18/2010 <0.005 -- <1 <0.05 2.72 MW-200S 1/6/2011 <0.005 <1 <1 <0.05 12.9 MW-200S 5/4/2011 <0.005 <1 <1 <0.05 4.47 MW-200S 9/6/2011 0.009 <1 <1 <0.05 111 MW-200S 1/9/2012 <0.005 <1 <1 <0.05 36 MW-200S 5/9/2012 <0.005 <1 <1 <0.05 24.1 MW-200S 9/5/2012 <0.005 <1 <1 <0.05 35.1 MW-200S 1/8/2013 <0.005 <1 <1 <0.05 13.7 IVIVV-LVVJ J1014v1J IV.VVJ <1 <v.VJ 14.J MW-200S 9/9/2013 <0.005 <1 <1 <0.05 9.8 MW-200S 1/9/2014 <0.005 <1 <1 <0.05 15.8 MW-200S 5/6/2014 <0.005 <1 <1 <0.05 13.1 Belews Creek Steam Station Page 9 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: Units: NS NTU IVIVV-LUUJ MW-200S 7/7/LV14 1/6/2015 GV.VV.7 <0.005 Gl <1 111 <1 GU. <0.05 U.7 25.1D 11.4 MW-200S 5/5/2015 <0.005 <1 <1 <0.05 2.87 MW-200S 9/10/2015 <0.005 <1 <1 <0.05 48.4 MW-200S 1/5/2016 <0.005 1.04 <1 <0.05 14.2 MW-200S 5/25/2016 <0.005 <1 <1 <0.05 10.4 MW-200D 1/6/2011 <0.005 <1 <1 <0.05 16.5 MW-200D 5/4/2011 <0.005 <1 <1 <0.05 15.2 MW-200D 9/6/2011 <0.005 <1 <1 <0.05 18.7 MW-200D 1/9/2012 <0.005 <1 <1 <0.05 6.43 MW-200D 5/9/2012 <0.005 <1 <1 <0.05 8.16 MW-200D 9/5/2012 <0.005 <1 <1 <0.05 1.63 MW-200D 1/8/2013 <0.005 <1 <1 <0.05 5.44 MW-200D 5/8/2013 <0.005 <1 <1 <0.05 15.3 MW-200D 9/9/2013 <0.005 <1 <1 <0.05 14.4 MW-200D 1/9/2014 <0.005 <1 <1 <0.05 17.5 MW-200D 5/6/2014 <0.005 <1 <1 <0.05 13 MW-200D 9/9/2014 0.005 <1 <1 <0.05 9.44 MW-200D 1/6/2015 <0.005 <1 <1 <0.05 5.93 MW-200D 5/5/2015 <0.005 <1 <1 <0.05 0.35 MW-200D 9/10/2015 <0.005 <1 <1 <0.05 2.14 MW-200D 1/5/2016 <0.005 1.02 <1 <0.05 1.19 MW-200D 5/25/2016 <0.005 <1 <1 <0.05 0.45 MW-201D 1/6/2011 <0.005 <1 <1 <0.05 17.9 MW-201D 5/4/2011 <0.005 <1 <1 <0.05 16.6 MW-201D 9/6/2011 <0.005 <1 <1 <0.05 35.1 MW-201D 1/9/2012 <0.005 <1 <1 <0.05 24.9 MW-201D 5/9/2012 <0.005 <1 <1 <0.05 10.1 MW-201D 9/5/2012 <0.005 <1 <1 <0.05 9.55 MW-201D 1/8/2013 <0.005 <1 <1 <0.05 4.15 MW-201D 5/9/2013 <0.005 <1 <1 <0.05 6.86 MW-201D 9/10/2013 <0.005 <1 <1 <0.05 12.3 MW-201D 1/8/2014 <0.005 <1 <1 <0.05 22.9 MW-201D 5/6/2014 <0.005 <1 <1 <0.05 5.5 MW-201D 9/9/2014 <0.005 <1 <1 <0.05 16 MW-201D 1/6/2015 <0.005 <1 <1 <0.05 10.3 MW-201D 5/5/2015 <0.005 <1 <1 <0.05 8.53 MW-201D 9/10/2015 <0.005 1.07 <1 <0.05 23.7 MW-201D 1/5/2016 <0.005 1.07 <1 <0.05 15.1 MW-201D 5/25/2016 <0.005 <1 <1 <0.05 89.6 MW-202S 1/6/2011 <0.005 <1 <1 <0.05 8.44 MW-202S 5/4/2011 <0.005 <1 <1 <0.05 6.78 MW-202S 9/6/2011 <0.005 <1 <1 <0.05 2.96 MW-202S 1/9/2012 <0.005 <1 <1 <0.05 2.25 MW-202S 5/9/2012 <0.005 <1 <1 <0.05 2.77 MW-202S 9/5/2012 <0.005 <1 <1 <0.05 2.56 MW-202S 1/9/2013 <0.005 <1 <1 <0.05 2.6 MW-202S 5/8/2013 <0.005 <1 <1 <0.05 3.76 MW-202S 9/9/2013 <0.005 <1 <1 <0.05 3.79 MW-202S 1/8/2014 <0.005 <1 <1 <0.05 3.47 MW-202S 5/6/2014 <0.005 <1 <1 <0.05 2.1 MW-202S 9/9/2014 <0.005 <1 <1 <0.05 1.78 MW-202S 1/6/2015 <0.005 <1 <1 <0.05 2.06 MW-202S 5/5/2015 <0.005 1.05 <1 <0.05 0.69 MW-202S 9/3/2015 <0.005 <1 <1 <0.05 6.97 MW-202S 1/5/2016 <0.005 <1 <1 <0.05 7.78 Belews Creek Steam Station Page 10 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: Units: M, NS NTU MW-202S MW-202D 5/25/2016 1/6/2011 <0.005 0.045 <1 <1 <1 <1 <0.05 <0.05 4.35 513 MW-202D 5/4/2011 <0.005 <1 <1 <0.05 14 MW-202D 9/6/2011 <0.005 <1 <1 <0.05 18.9 MW-202D 1/9/2012 <0.005 <1 <1 <0.05 5.75 MW-202D 5/9/2012 <0.005 <1 <1 <0.05 3.09 MW-202D 9/5/2012 <0.005 <1 <1 <0.05 12.6 MW-202D 1/9/2013 <0.005 <1 <1 <0.05 5.71 MW-202D 5/8/2013 <0.005 <1 <1 <0.05 6.32 MW-202D 9/9/2013 <0.005 <1 <1 <0.05 5.13 MW-202D 1/8/2014 <0.005 <1 <1 <0.05 11.7 MW-202D 5/6/2014 <0.005 <1 <1 <0.05 2.8 MW-202D 9/9/2014 0.006 <1 <1 <0.05 2.05 MW-202D 1/6/2015 <0.005 <1 <1 <0.05 1.77 MW-202D 5/5/2015 <0.005 1.16 <1 <0.05 1.08 MW-202D 9/3/2015 <0.005 1.08 <1 <0.05 18 MW-202D 1/5/2016 <0.005 1.15 <1 <0.05 6.79 MW-202D 5/25/2016 <0.005 <1 <1 <0.05 3.26 MW-203S 1/6/2011 <0.005 <1 <1 <0.05 0.4 MW-203S 5/4/2011 <0.005 <1 <1 <0.05 0.93 MW-203S 9/6/2011 <0.005 <1 <1 <0.05 1.46 MW-203S 1/9/2012 <0.005 <1 <1 <0.05 0.67 MW-203S 5/9/2012 <0.005 <1 <1 <0.05 0.8 MW-203S 9/5/2012 <0.005 <1 <1 <0.05 0.84 MW-203S 1/9/2013 <0.005 <1 <1 <0.05 1.43 MW-203S 5/9/2013 <0.005 <1 <1 <0.05 0.62 MW-203S 9/10/2013 <0.005 <1 <1 <0.05 8.29 MW-203S 1/8/2014 <0.005 <1 <1 <0.05 1.97 MW-203S 5/6/2014 <0.005 <1 <1 <0.05 1.1 MW-203S 9/9/2014 <0.005 <1 <1 <0.05 1.08 MW-203S 1/6/2015 <0.005 <1 <1 <0.05 1.46 MW-203S 5/5/2015 <0.005 1.2 <1 <0.05 0.38 MW-203S 9/3/2015 <0.005 1.01 <1 <0.05 1.32 MW-203S 1/5/2016 <0.005 <1 <1 <0.05 3.02 MW-203S 5/25/2016 <0.005 <1 <1 <0.05 2.87 MW-203D 1/6/2011 <0.005 <1 <1 <0.05 2.96 MW-203D 5/4/2011 <0.005 <1 <1 <0.05 1.75 MW-203D 9/6/2011 <0.005 <1 <1 <0.05 0.97 MW-203D 1/9/2012 <0.005 <1 <1 <0.05 1.37 MW-203D 5/9/2012 <0.005 <1 <1 <0.05 0.76 MW-203D 9/5/2012 <0.005 <1 <1 <0.05 0.57 MW-203D 1/9/2013 <0.005 <1 <1 <0.05 0.94 MW-203D 5/9/2013 <0.005 <1 <1 <0.05 1.31 MW-203D 9/10/2013 <0.005 <1 <1 <0.05 8.77 MW-203D 1/8/2014 <0.005 <1 <1 <0.05 5.5 MW-203D 5/6/2014 <0.005 <1 <1 <0.05 3.4 MW-203D 9/9/2014 <0.005 <1 <1 <0.05 2.75 MW-203D 1/6/2015 <0.005 <1 <1 <0.05 2.12 MW-203D 5/5/2015 <0.005 <1 <1 <0.05 2.16 MW-203D 9/3/2015 <0.005 1.17 <1 <0.05 9.21 MW-203D 1/5/2016 <0.005 1.02 <1 <0.05 5.62 MW-203D 5/25/2016 <0.005 <1 <1 <0.05 3.6 MW-204D 1/6/2011 <0.005 <1 <1 <0.05 9.36 MW-204D 5/4/2011 <0.005 <1 <1 <0.05 8.34 MW-204D 9/6/2011 <0.005 <1 <1 <0.05 32.4 MW-204D 1/9/2012 <0.005 <1 <1 <0.05 3.54 Belews Creek Steam Station Page 11 of 12 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: U n its: Irzt: NS NTU MW-204D MW-204D 5/9/2012 9/5/2012 0.006 <0.005 <1 <1 <1 <1 <0.05 <0.05 5.73 5.55 MW-204D 1/8/2013 0.005 <1 <1 <0.05 8.96 MW-204D 5/9/2013 0.005 <1 <1 <0.05 2.15 MW-204D 9/10/2013 <0.005 <1 <1 <0.05 6.7 MW-204D 1/9/2014 0.007 <1 <1 <0.05 13.4 MW-204D 5/6/2014 <0.005 <1 <1 <0.05 10.4 MW-204D 9/9/2014 <0.005 <1 <1 <0.05 3.56 MW-204D 1/6/2015 <0.005 <1 <1 <0.05 11.1 MW-204D 5/5/2015 0.006 <1 <1 <0.05 4.04 MW-204D 9/3/2015 0.006 <1 <1 <0.05 3.94 MW-204D 1/5/2016 0.005 <1 <1 <0.05 4.52 MW-204D 5/25/2016 <0.005 <1 <1 <0.05 1.99 MW-204S 1/6/2011 <0.005 <1 <1 <0.05 10.9 MW-204S 5/4/2011 <0.005 <1 <1 <0.05 6.33 MW-204S 9/6/2011 <0.005 <1 <1 <0.05 16.1 MW-204S 1/9/2012 <0.005 <1 <1 <0.05 1.24 MW-204S 5/9/2012 <0.005 <1 <1 <0.05 2.48 MW-204S 9/5/2012 <0.005 <1 <1 <0.05 1.31 MW-204S 1/8/2013 0.006 <1 <1 <0.05 1.49 MW-204S 5/9/2013 0.01 <1 <1 <0.05 2.1 MW-204S 9/10/2013 0.016 <1 <1 <0.05 5.18 MW-204S 1/9/2014 0.014 <1 <1 <0.05 5.4 MW-204S 5/6/2014 0.017 <1 <1 <0.05 4.86 MW-204S 9/9/2014 0.012 <1 <1 <0.05 3.34 MW-204S 1/6/2015 0.013 <1 <1 <0.05 9.88 MW-204S 5/5/2015 0.011 <1 <1 <0.05 8.82 MW-204S 9/3/2015 0.01 1.2 <1 <0.05 5.03 MW-204S 1/5/2016 0.014 <1 <1 <0.05 8.88 MW-204S 5/25/2016 0.017 <1 <1 <0.05 4.22 Notes: 1. °C indicates temperature measured in degrees celsius 2. mV indicates oxidation/reduction potential measured in millivolts 3. µO/cm indicates specific conductivity measured in micromhos per centimeter 4. mg/L indicates concentrations measured in milligrams per liter 5. µg/L indicates concentrations measured in micrograms per liter 6. SU indicates pH values measured in standard units 7. NTU indicates turbidity values measured in Nephalometric Turbidity Units 8. Parameters are compared to standards found in 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina 9. 2L Standards are established as part of 15A NCAC 02L .0202 10. Interim Maximum Allowable Concentrations (IMACs) can be found in Appendix #1 of 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina Belews Creek Steam Station Page 12 of 12 CSA Supplement 2 Table 1-3: 2L Groundwater Standard Exceedances from NPDES Sampling 2L Standard: 700 10 Units: ug/L Itg/ 300 50 0.2 500,000 6.5 — 8.5 ag/L Ltg/L w/L Ilg/L SU MW-200S 1/6/2011— 5/25/2016 No Exceedances No Exceedances 434 — 3,540 68 —1,300 0.36 No Exceedances 4.99 — 6.06 MW-200D 1/6/2011— 5/25/2016 1,060 No Exceedances 310 —1,240 83 —110 0.35 510,000 5.94 — 6.45 MW-201D 1/6/2011— 5/25/2016 No Exceedances No Exceedances 330 —1,790 53 —101 0.21 No Exceedances 5.8 — 6.41 MW-202S MW-202D MW-203S 1/6/2011— 5/25/2016 1/6/2011— 5/25/2016 1/6/2011— 5/25/2016 No No No Exceedances Exceedances Exceedances No No Exceedances 15 Exceedances 365 350 — 7,280 No Exceedances No Exceedances 62 — 413 No Exceedances No No No Exceedances Exceedances Exceedances No No No Exceedances Exceedances Exceedances 5.26 5.64 5.3 — — 5.73 — 6.3 5.73 MW-203D 1/6/2011— 5/25/2016 No Exceedances No Exceedances 558 No Exceedances No Exceedances No Exceedances 6.3 — 6.49 MW-204S 1/6/2011— 5/25/2016 No Exceedances No Exceedances 1,900 —14,100 315 — 3,600 No Exceedances No Exceedances 5.3 — 6.32 MW-204D 1/6/2011— 5/25/2016 No Exceedances No Exceedances 313 —1,350 77 — 1,130 No Exceedances No Exceedances 5.22 — 6.11 Notes: 1. mg/L indicates concentrations measured in milligrams per liter 2. µg/L indicates concentrations measured in micrograms per liter 3. SU indicates pH values measured in standard units 4. Parameters are compared to standards found in 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina 2L Standards are established as part of 15A NCAC 02L .0202 5. Interim Maximum Allowable Concentrations (IMACs) can be found in Appendix #1 of 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina Belews Creek Steam Station Page 1 of 1 CSA Supplement 2 Table 2-1: Responses to Global NCDEQ Comments Check latitude and longitude shown on report cover pages (the HDR will review and provide corrected latitude and longitude coordinates for the sites in forthcoming General 1 conversion appears to be incorrect on the Mooresville region reports, if needed. reports and needs to be reconciled). "Proposed Provisional Background Concentrations" or PPBCs is the terminology used for statistically Background 2 Use terminology PEPA "provisional estimates for purposes of determined background concentrations in the CAP reporting. PPBCs are discussed in CAP Part 1, Section 2. assessment" provide for background concentrations of COls. The approach to refine PPBCs when additional data is available is presented in CSA Supplement 2, Section 4. COI Use results from porewater, groundwater and other media to COls were selected based on exceedances found in porewater, groundwater, soil, and surface water 3 develop COI list. sample results. Hexavalent Chromium is included as a CO] in CAP Part 1 data tables and is considered with respect to the include as COI at each site duer interest and due to NC DHHS screening level and has been carried forward with subsequent evaluations. Samples were COI 4 receptor recepwell results. Use NCDHHS screening ning value. analyzed for Hexavalent Chromium in select groundwater monitoring wells, and further Cr(VI) evaluation may take place based on the results of each site respectively. CAP Part 1, Section 1.9.2 states that Cr(VI) is included in the COI list. Need to evaluate vanadium and strontium at every site to show Vanadium has been considered across the sites in CSA reporting. Strontium was not included in the CSA COI 5 differences between background concentrations and potential tables, however strontium data was collected with other constituents, including vanadium, and is source -related concentrations. presented in the CSA Supplement 2. COI - Receptors 6 Add evaluation of receptor wells in CAP. Water supply wells are shown on Figure 1-3 in the CSA Supplement 2 along with analytical results facilitating the interpretation of receptor water quality relative to site water quality. Private and public water supply wells sampled should be shown Water supply wells are shown on Figure 1-3 in the CSA Supplement 2 along with analytical results COI - Receptors 7 on a map with zoom in boxes showing concentration results even facilitating the interpretation of receptor water quality relative to site water quality. if below 2L. COI - Receptors 8 Add table with all receptor well results. Water supply wells are shown on Figure 1-3 in the CSA Supplement 2 along with analytical results facilitating the interpretation of receptor water quality relative to site water quality. All private receptor wells shown on figures (use or add DEQ designations). All water supply wells are shown on Figure 1-3. Those water supply wells that can be shown in the COI - Receptors 9 Show results for detection constituents. viewports of the the potentiometric surface and isoconcentration figures in the CSA Supplement 2 are also included. A table of analytical results, including strontium, is included on Figure 1-3. Add strontium. Add total uranium and Ra226+228. DEQ considers radionuclides to be a driver of alpha activity in the ash basins. Sample the following locations both below ash ponds and other downgradient areas Select wells located downstream and along transects were sampled for these constituents in the CSA and COI where other constituent concentrations are high: Post-CSA sampling periods. At the time of the CSA Supplement 2, the analytical results from Round 5 had 10 Downgradient monitoring well locations, at locations with been received and upon review, were recommended for re -issue prior to completing review and inclusion exceedances, and at background locations. in the CSA Supplement 2. Upon receipt, these data will be provided in a subsequent submittal. Uranium and Ra226+228 may be included in NPDES monitoring. List Federal MCL as standard for Ra 226-228 and uranium. Source Characterization 11 Address soils as being primary and secondary sources —address in A separate risk assessment has been provided subsequent to the CSA report by Duke Energy via Haley & CAP and CSA supplement. Aldritch. Source Characterization Describe how geochemical conditions may affect release of 12 Discussion of geochemical conditions were provided in CAP Part 2 with geochemical modeling results. naturally occurring constituents such as iron and manganese. CSA Supplement 2 Table 2-1: Responses to Global NCDEQ Comments Source Characterization 13 Soil to be identified as secondary source — due to leaching of ash A separate risk assessment has been provided subsequent to the CSA report by Duke Energy via Haley & onto unsaturated soil. Aldritch. Background soil concentrations need to be evaluated. Native soils Background 14 may be a source based on geochemical conditions in/beneath the Proposed Provisional Background Concentrations or PPBCs are discussed in CAP Part 1, Section 2. The ash ponds. Need to address background soil conditions and approach to refine PPBCs when additional data is available is presented in CSA Supplement 2, Section 4. relationship to observed 2L exceedances. "Proposed Provisional Background Concentrations" or PPBCs is the terminology used for statistically Background 15 Provide "provisional estimates" of background if there are determined background concentrations in the CAP reporting. PPBCs are discussed in CAP Part 1, Section 2. insufficient numbers of samples for statistics. The approach to refine PPBCs when additional data is available is presented in CSA Supplement 2, Section 4. A similar analysis/evaluation of downgradient soils and their Background 16 relationship to 2L exceedances also needs to be included in the Proposed Provisional Background Concentrations or PPBCs are discussed in CAP Part 1, Section 2. The approach to refine PPBCs when additional data is available is presented in CSA Supplement 2, Section 4. CAP. Background Potential release mechanisms need to be considered in the CAP 17 Discussion of potential migration pathways is discussed in CAP Part 2, Section 3.3 (i.e., migration of leachate beneath the ash basin, etc.). Background determinations. Background concentrations need to "Proposed Provisional Background Concentrations" or PPBCs is the terminology used for statistically be evaluated to determine site -specific constituent concentration determined background concentrations in the CAP reporting. PPBCs are discussed in CAP Part 1, Section 2. Background 18 levels and this evaluation needs to be included in CAP. Use all The approach to refine PPBCs when additional data is available is presented in CSA Supplement 2, Section available historic data from compliance wells and newly installed wells. 4. Background groundwater monitoring wells need to be sampled 2 Background 19 more times before the end of 2015 (samples need to be These samples have been collected. Data from Rounds 2 through 4 was included in the CAP Part 2. speciated). Separate background concentrations need to be determined for "Proposed Provisional Background Concentrations" or PPBCs are discussed in CAP Part 1, Section 2. The Background 20 shallow, intermediate and deep flow layers (as well as any other approach to refine PPBCs when additional data is available is presented in CSA Supplement 2, Section 4. site -specific conditions like wetlands). This approach includes consideration to these calcuations by flow layer. Background 21 Use all available site data (include example background wells PHR, Background data from historical sources was utilized where applicable in the CAP Part 2. FGD, Craig Rd.). Well and Constituents 22 Wells must meet 2C rule requirements; turbidity cannot impact Results from Round 5 sampling are presented in the CSA Supplement 2 and wells with turbidity results results. above 10 NTU are identified so that results may be qualified upon review. Elevated pH and turbidity must be addressed or well must be Duke Energy has installed additional monitoring wells to address concerns with elevated pH and turbidity Well and Constituents 23 redeveloped or replaced. seen when sampling as well as to refine understanding of exceedances. Results from the Round 5, including additional assessment wells, has been included in CSA Supplement 2. Include discussion of pH and turbidity in background well "Proposed Provisional Background Concentrations" or PPBCs are discussed in CAP Part 1, Section 2. The Well and Constituents 24 discussion. approach to refine PPBCs when additional data is available is presented in CSA Supplement 2, Section 4. This approach includes consideration to these calcuations by utilizing viable samples below 10 NTU. "Proposed Provisional Background Concentrations" or PPBCs are discussed in CAP Part 1, Section 2. The Well and Constituents 25 Results above 10 NTU to be removed from data set for statistics. approach to refine PPBCs when additional data is available is presented in CSA Supplement 2, Section 4. This approach includes consideration to these calcuations by utilizing viable samples below 10 NTU. CSA Supplement 2 Table 2-1: Responses to Global NCDEQ Comments Soil Contamination 27 General Resolution delineation of COls are noted on cross sections included in the CSA Supplement 2. anuw tAWFIL of pmn nguleb dew un uu»>eu.wnb. Compare soil results to Preliminary Soil Remediation Goals (PSRG) Where additional soil samples were collected as part of the installation of additional assessment wells, for protection of groundwater standards (POG). those results will be presented to PSRG POG standards. Soil Contamination 28 roIKL vs. rw are issue Tor seiectea constituents; tnis may require uuKe tnergy worKea witn the Taos to reauce the reporting emits. however, iowenng me roircL to Detow ine resampling. FOG was not able to be achieved to date for certain constituents. Soils PSRGs, detection limits above standards is problematic. Soil Contamination 29 Review IHSB Guidelines for Assessment and Cleanup section Duke Energy worked with the labs to reduce the reporting limits. However, lowering the MRL to below the 4.1.1.2 to develop site specific background values for soil, if FOG was not able to be achieved to date for certain constituents. applicable Soil Contamination 30 Cr(VI) is driving risk, use Cr(VI) in review. In the CAP reporting as well as CSA Supplement 2, Cr(VI) is added to the list of Cols in groundwater. Soil Contamination 31 Need to compare soils results to Cr(VI) (not Cr(III)). Soils will be compared to the PSRG POG Cr(VI) standard of 3.8 mg/kg in subsequent reporting, where additional soil samples were collected. Hydrology/geologic controls and the effects on contaminant On June 25, 2015, NCDEQ requested that these geochemical issues be addressed in a Site Conceptual and transport are not discussed in CSA. Discuss Model. This topic was introduced in the CSA and announced that the SCM would be refined as an iterative Hydrologdistribution and Chemical Controls Chemical Controls 32 relative to DO, pH, Eh, etc. It is imperative that this discussion be process in the forthcoming CAP. CAP Part 1 Section 3.2.2 included discussion of general geochemical included as part of CAP #1 as this is requirement of CAMA. The characteristics such as cations/anions, redox potential, solute speciation, and Kd testing. These items were discussion can be refined in CAP #2. further addressed in CAP Part 2 Section 2.4.4, and Section 3.3. On June 25, 2015, NCDEQ requested that these geochemical issues be addressed in a Site Conceptual Model. This topic was introduced in the CSA and announced that the SCM would be refined as an iterative Hydrology/Geology and Discuss how geochemical conditions affect contaminant process in the forthcoming CAP. CAP Part 1 Section 3.2.2 included discussion of general geochemical Chemical Controls 33 distribution? (Geochemical "halo' releasing Mn and Fe). characteristics such as cations/anions, redox potential, solute speciation, and Kd testing. These items are further addressed in CAP Part 2 Section 2.4.4: Site Geochemistry and Influence on COls, which treats spatial distribution of groundwater geochemistry relative to the source area. Hydrology/Geology and 34 Specify where differences exist from LeGrand conceptual model. The CAP Part 2 report states where the model is consistent with LeGrand, specifically in the Groundwater Chemical Controls Migration subsection, and the COI Occurrence and Distribution Section. Groundwater velocities in bedrock and transition zone appear to Hydrology/Geology and Chemical Controls 35 be too high. Verify or correct these values. Describe transmissivity These values were corrected and updated in CAP Part 2 Appendix A. concept versus joint flow velocity. Hydrology/Geology and 36 Explain why one contaminant may be elevated in a particular area. CAP Part 2 Section 3.7 included an expanded discussion of site geochemical controls on contaminant Chemical Controls mobility and migration to address this concern. Hydrology/Geology and 37 Describe how constituents are mobilized or attenuated CAP Part 2 Section 3.7 included an expanded discussion of site geochemical controls on contaminant Chemical Controls . mobility and migration to address this concern. Describe geochemical conditions and mechanisms, and charges, The groundwater model considers linear adsorption (Freundlich adsorption for select COls in the Buck Hydrology/Geology and along flow paths. DEQ considers flow paths to be from the model) for COls (except sulfate and chloride). The adsorption term (Kd) is uniform within the model Chemical Controls 38 maximum concentration for a COI to a receptor or to the domain, including from the active and inactive ash basins/storage (sources) to downgradient monitor wells compliance boundary. and the compliance boundary. CAP Part 2, Appendix B, groundwater model. Hydrology/Geology and 39 Describe nature of sorptive materials present in three-part system Sorption constants and calculations are described in CAP Part 2 Section 4.3, in the methodology subsection Chemical Controls and along flow paths to receptors. CSA Supplement 2 Table 2-1: Responses to Global NCDEQ Comments The groundwater model is setup per source area and then calibrated to concentrations observed in downgradient monitor wells. Calibration to observed concentrations is achieved by adjusting source Describe how boron, sulfate, TDS "islands" are located along flow concentrations within active/inactive ash basins and ash storage areas within the measured values, Hydrology/Geology and adjusting hydraulic conductivity based on reported values, adjusting kd based on lab data, and other chemical Controls 40 paths and how these are considered/incorporated into HGCM and measured hydrogeologic properties. The calibration attempts to match concentrations observed in numerical models. downgradient monitor wells by matching the flow paths and thus the observed COI "islands". The model did not incorporate TDS (boron and sulfate are both included in the groundwater model. CAP Part 2, Appendix B, groundwater model. Hydrology/Geology and Chemical Controls Hydrology/Geology and Chemical Controls Hydrogeologic and Other Geochemical Conceptual Subsurface drainage systems at dike/dams should be shown and 41 potential impacts to fate & transport modeling should be Subsurface drainage systems are shown and discussed in Section 4 of the CSA reports. They are shown in described in in hydrogeologic and geochemical conceptual the CSA Section 4 Figures. models. Pond, river, and lake elevations will be shown on figures where applicable. For example, in the CSA 42 Show measured water levels on ponds, streams, rivers. Supplement 2, these elevations are included on the shallow potentiometric figures, but not on all flow 43 Refined conceptual model needs to be presented in CAP I. Site Conceptual Models were updated and included in the CAP Part 2. Hydrogeologic and Other Geochemical Conceptual Models 44 Hydrogeo and geochemical conceptual models need to be discussed in terms of specific source areas. Include upgradient, source, and downgradient. Develop narrative for each source area and downgradient footprint (flow system recharge/discharge, horizontal flow direction, flow paths emanating from all sides (include map). CAP Part 2 Section 2.4.4 included discussion of geochemical parameters with consideration to whether there are trends upgradient or downgradient from the source. The refined SCM also included flow paths determined across the entire site. Hydrogeologic and Other Explain implications of vertical gradients in recharge and discharge Vertical hydraulic gradients were calculated for Round 2 data, and were included in CAP Part 1. The Geochemical Conceptual Models 45 area in each source area and its downgradient footprint. patterns in vertical gradients are discussed in CAP Part 2 Section 2.3.1.1. Hydrogeologic and Other Include effects f receptor wells in discussion. Also include In CAP Part 2 Appendix C, the issue of pumping wells is discussed. Where appropriate,. pumping wells are Geochemical Conceptual 46 possible impactssfrom basin to receptors in conceptual model included as an influence in the groundwater model. For example, for the DEC Cliffside site, the pumping Models discussions. wells weren't modeled because of the influence of the Broad River. Other DEC sites, such as Allen, Belews Creek, and Buck, the pumping wells were included in the model. Hydrogeologic and Other Site heterogeneities are not adequately explained. Explain existing The groundwater models are being updated and recalibrated including new data as it has becoms available Geochemical Conceptual 47 heterogeneities and implications for fate and transport modeling. as part of the expanded groundwater model domain activities. Uncertainties and limitations will be Models Describe uncertainties and explain impact of uncertainties. presented as part of the results, which are expected to be completed during Fall 2016. Hydrogeologic and Other The groundwater models are being updated and recalibrated including new data as it has becoms available Geochemical Conceptual 48 Explain impact of uncertainties in conceptual model. as part of the expanded groundwater model domain activities. Uncertainties and limitations will be Models presented as part of the results, which are expected to be completed during Fall 2016. Hydrogeologic and Other Geochemical Conceptual 49 Models Hydrogeologic and Other Geochemical Conceptual 50 Models Ensure that streams, wetlands, etc. shown in Section 12 are included on all figures as needed. Include in conceptual model discussions as appropriate. Description of AMEC ecological survey report findings not utilized in report or in figures. Data should be used, shown on figures or not. CAP Part 2 Section 2 figures include wetlands and streams. Ecological data concerning vegetation was included in the CSA Section 12 Risk Assessment and referenced in the Eco-Checklists provided for each site. CSA Supplement 2 Table 2-1: Responses to Global NCDEQ Comments I Type Comment Number Comment Batch geochemical modeling for each of three layers per General Resolution As provided in CAP Part 2 Modeling Appendix B, Model Construction Section, each constituent was Modeling 51 constituent with narrative of what happens along flow path. modeled in one of 7 layers, which fall into the following categories: Ash material, Dike and ash storage Select flow path alignment with MOD PATH. material, Alluvium, M1 Saprolite, M2 Saprolite, Transition Zone, and Fractured bedrock. Describe geochemical conditions and mechanisms, and charges, Modeling 52 along flow paths. DEQ considers flow paths to be from the MODPATH was used to identify and delineate flow paths. This is displayed in CAP Part 2 Modeling Appendix maximum concentration for a COI to a receptor or to the B, Model Calibration in the particle tracking figure. compliance boundary. Model should use highest COPC in source area for model input. The model presented in the CAP Part 2 Appendix B uses variable concentrations in the source areas to Modeling 53 There will be different flow paths as flow path is based on match downgradient concentrations observed in monitor wells. In areas where the flow path from the maximum concentration of COI. source to an elevated observed concentration in a monitor well is observed, the highest measured source concentration is used in the model. Impacts from Fe, Mn are not related to Kd — how will modeling The groundwater model does not address Fe and Mn, however the geochemical modeling report does Modeling 54 treat Fe and Mn as COls (CAP Part 2 Appendix E), and determines the forms they likely exist in under address these constituents? conditions at the respective sites (CAP Part 2 Appendix E Section 2: Pourbaix diagrams). Modeling 55 Groundwater modeling should use site specific Kds. Sorption terms were developed and utilized as part of the groundwater modeling presented in CAP Part 2, Appendix B. Describe Kds and HFO or soil samples in areas not affected by ash. Modeling 56 Explain differences between these Kds and Kds from impacted A uniform Kd value for the groundwater model was utilized as these values are variable from sample to sample, regardless of site location (CAP Part 2, Appendix A, Groundwater Model). areas. Groundwater flow modeling in CAP needs to account for cumulative effect of off -site receptor wells (i.e., water supply The cumulative effect of off -site receptor wells were accounted for in the groundwater modeling (CAP Part wells). Need to come up with some assumptions regarding depth 2 Modeling Appendix B). The yield of these wells was estimated at 400 gpd, which is the average EPA I 57 and yield. CSA reports generally discount potential for upgradient household usage. The groundwater models are being updated and recalibrated including new data as it flow direction resulting from off -site pumping. Model results need has becoms available as part of the expanded groundwater model domain activities, including water supply to be included in the CAP now and revise once results are in from well information. Uncertainities and limitations will be presented as part of the results, which are expected data gap wells that are located to help inform groundwater flow to be completed during Fall 2016. direction near the property boundary. The groundwater model was calibrated to steady-state flow conditions and considered water levels from summer 2015. Historic water levels in the ponds were not modeled. The timing of start of the ash Modeling 58 Address historic water levels in pond in groundwater modeling. operations in different basins was considered in the groundwater model. The groundwater models are being updated and recalibrated including new data as it has becoms available as part of the expanded groundwater model domain activities, including historic water levels. Need to discuss how groundwater model results are incorporated The CAP Part 1 Surface water modeling Appendix details how groundwater model results are incorporated Modeling 59 in surface water model results (including how on -site streams are in surface water model results. incorporated). Modeling 60 Deep rock groundwater flow not well presented relative to off -site Particle flow maps that take into account offsite pumping are presented in the groundwater modeling pumping. This needs to be presented in CAP. Appendix B of the CAP Part 2. Subsurface drainage systems at dike/dams should be shown and Modeling 61 potential impacts to fate & transport modeling should be Subsurface drainage systems are shown and discussed in Section 4 of the CSA reports. considered. CSA Supplement 2 Table 2-1: Responses to Global NCDEQ Comments r— �Type Comment Number Comment Guidelines require — seep, sediment, surface water, receptor well General Resolution CAP Part 2 included chem box maps for seeps, sediments, surface water, and groundwater. Chem boxes for Data Presentation 62 data, results show all COIs (field and results) in chem boxes. receptor wells were not able to be shown spatially for all sampling events, however, Figure 1-3 in the CSA Supplement 2 shows location and analytical results. Data Presentation 63 Show concentrations above PQLs on chem box maps, not just Chem box maps show all detected constituents for detection and assessment monitoring constituents as constituents above 2L. part of the CAP Part 2. Data Presentation 64 Add vertical gradients to figures —plan view. CAP Part 1 Section 3 included figures depicting vertical gradients between shallow and deep wells, and between deep and bedrock wells. Data Presentation 65 Add vertical gradient maps. CAP Part 1 Section 3 includes figures depicting vertical gradients between shallow and deep wells, and between deep and bedrock wells. Data Presentation 66 Develop a potentiometric surface map for the transition zone Deep flow layer wells are used to investigate the transition zone, and potentiometric surfaces figures were wells. developed as part of the CAP Part 2 as well as CSA Supplement 2. Piper diagram figures are in Section 10 of the CSA. Updated piper diagrams utilizing Round 5 data have Data Presentation 67 Show cation -anion balance values on Piper diagrams, remove been included in the CSA Supplement 2 to include only those events with balance differences that are less results with balance differences > 10%. than 10%. Show all receptor wells on figures given the existing figure Figure 1-3 in the CSA Supplement 2 presents all receptor wells and their analytical results. Those water Data Presentation 68 supply wells that can be shown in the viewports of the the potentiometric surface and isoconcentration extents. figures in the CSA Supplement 2 are also included. Data Presentation 69 Need one map with all receptor wells and MWs. Figure 1-3 in the CSA Supplement 2 presents all receptor wells and their analytical results. Data Presentation 70 Show seep results with chem boxes. Seeps and DEQ Seeps were provided in CAP Part 1 Section 2 figures. Data Presentation 71 Show topography on groundwater surface contour maps (add Topography has been included on the potentiometric surface figures provided in CSA Supplement 2. elevation labels to contours). Add geologic data and iso-concentration data (include Kds) on Cross -sections will be expanded with additional assessment monitoring wells for the CSA Supplement 2. Data Presentation 72 cross -sections. These will include lithology, recovery, ROD, where available, as well as the vertical extent of COls Data Presentation 73 Add figure showing pH, Eh, etc. results. CAP Part 1 Section 2 Chem Box figures included field parameters. Data Presentation 74 Add table w/NPDES sample event results. A NPDES sample events results table has been provided in Section 1 of the CSA Supplement 2. Data Presentation 75 Chem box figures for groundwater— add round 2 data as column Round 2 chembox figures were included in CAP Part 2. to right of existing data. Iso contours - Need to address how iso contour lines are shown on figures. Show part of the line as dashed where uncertainty exists Data Presentation 76 (i.e., no downgradient data to help determine extent of iso Isoconcentration maps utilizing Round 5 analytical results, including strontium, where it is a COI, are contour). Depict concentrations above reporting limit. included in CSA Supplement 2. Add iso-contour figure for strontium. Need to show natural resource information (i.e., surface water Data Presentation 77 features, wetland features, heron rookery at Buck, etc.) on "base CAP Part 2 Section 2 figures includes wetlands and streams which were delineated by USACE. Other map" figures. natural resources were included on figures as part of the Eco-Checklist referenced in Section 12 of the CSA. Data Presentation 78 Ensure that streams, wetlands, etc. shown in Section 12 are CAP Part 2 Section 2 figures included wetlands and streams as needed. included on all figures as needed. Data Presentation 79 Modify results tables to include field parameters DOs, Eh, spec Field parameters were included on the CAP Part 2 results tables, referenced in Section 2, as well as the CSA conductance, pH, NTU in all results tables. Supplement 2 results tables, referenced in Section 3. Surface, Groundwater Describe SW hydrology (streams, wetlands) in CAP and how CAP Part 2, Section 3 pertains to the Site Conceptual model, and it discusses surface water and seeps in Discharge 80 relates to seeps in CSM. relation to site source areas. Surface, Groundwater Check for alignment of description of streams and wetlands in CAP Part 2, Section 3 pertains to the Site Conceptual model, and it discusses surface water and seeps in Discharge 81 Section 12. relation to site source areas. CSA Supplement 2 Table 2-1: Responses to Global NCDEQ Comments CSA and CAP site maps include labels of major surface water bodies at each site. In addition, the CSA Surface, Groundwater Discharge 82 Show all surface water features on maps and cross sections. included surface water information in Figure 4-4: Surface Water Bodies. CAP Part 2 included Figure 3-1: Site Conceptual Model, and Figure 3-2: Cross Section with these features. Streamflow measurements have been incorporated into the expanded groundwater model domain Surface, Groundwater Discharge 83 Add wording on stream flow measurements performed. activities. The groundwater models are being updated and recalibrated including new data as it has becoms available and is expected to be completed during Fall 2016. Include non -trespassing recreation users of surface water and In the stand-alone Risk Assessment report, recreational swimmers, boaters, waders, and fishers are Risk Assessment 84 drinking water well receptors. included in the receptors, as are current/future off -site residents. In addition, a separate risk assessment has been provided subsequent to the CSA report by Duke Energy via Haley & Aldritch. Coal ash should be included as primary affected media until it is A separate risk assessment has been provided subsequent to the CSA report by Duke Energy via Haley & Risk Assessment 85 completely removed or otherwise made inaccessible to human Aldritch. contact. Revise Tables 12-1, 12-2, and wording in Section 12. Risk Assessment 86 Expand speciation results discussion with regards to receptors. A separate risk assessment has been provided subsequent to the CSA report by Duke Energy via Haley & Aldritch. Inadequate Data —All Where 2L exceedances intercept rivers/streams implications Vertical hydraulic gradients were calculated for Round 2 data, and were included in CAP Part 1. The Source Areas 87 should be discussed. Discuss vertical gradients for well pairs patterns in vertical gradients are discussed in CAP Part 2 Section 2.3.1.1. adjacent to rivers/streams. Inadequate Data — AII If a MW does not exist between a 2L exceedance and receptor Duke Energy has installed additional monitoring wells to address concerns to refine understanding of 88 (stream and water supply well) additional wells or transport exceedances. Results from the Round 5, including additional assessment wells, has been included in CSA Source Areas modeling is needed to fill data gap. Supplement 2. Inadequate Data —All If uncertainty exists about local flow due to insufficient number or Duke Energy has installed additional monitoring wells to address concerns to refine understanding of 89 placement of wells, then additional wells should be installed. exceedances. Results from the Round 5, including additional assessment wells, has been included in CSA Source Areas Same comment applies for uncertainty on vertical gradients. Supplement 2. CSA Supplement 2 Table 2-2. Total Porosity, Secondary (Effective) Porosity/Specific Yield, and Specific Storage for Lower Hydrostratigraphic Units (TZ and BR) Hydrostratigraphic Unit Secondary (Effective) Porosity / Specific Yield (%) Total Porosity (%) Specific Storage (1/ft) Transition Zone (TZ) 5.0 - 10.0 5 - 15 1.0E-06 - 2.1 E-05 Bedrock (BR) - Fractured 2.0 - 5.0 5 - 10 < 1.0E-06 Bedrock (BR) - Dense 0-3 0-5 < 1.0E-06 Notes: 1. Ranges based on published values (Domenico and Mifflin, 1965; Singhal and Gupta, 2010). 2. Effective porosity and specific yield are not synonymous. For practical purposes, they may be estimated as approximately equal in value. 3. Table revised 07/13/2016. Belews Creek Steam Station Page 1 of 1 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: AB-1D 3/30/2016 N BL-AB-1D AB-1S 3/30/2016 N BL-AB-1S AB-2D 3/30/2016 N BL-AB-21D AB-2S 3/30/2016 N BL-AB-2S AB-3D 3/30/2016 N BL-AB-31D AB-3S 3/30/2016 N BL-AB-3S AB-4BR 4/1/2016 N BL-AB-4BR AB-41D 4/1/2016 N BL-AB-4D AB-5D 3/31/2016 N BL-AB-SD Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 84700 5000 U 5000 U Alkalinity, HCO3 N ug/I 7600 10500 18600 123000 105000 24000 5000 U 112000 45100 Alkalinity, lab N ug/I 7600 10500 18600 123000 105000 24000 122000 112000 45100 Aluminum D ug/I 61 J 100 U 68 J 670 100 U 83 J 220 100 U 100 U Aluminum T ug/I 88.9 J 183 292 9940 J+ 106 124 258 100 U 100 U Antimony D ug/I 5 U 5 U 5 U 5 U 5 U 10 U 6.5 0.21 J 0.5 U Antimony T 1 IMAC ug/I 5 U 5 U 5 U 5 U 5 U 10 U 6.5 0.51 0.5 U Arsenic D -- ug/I 2.3 1.4 0.76 J 3.1 15.8 2 U 1.5 2.7 0.79 Arsenic T 10 02L ug/I 2.3 4 1.8 7.6 16.8 2 U 1.6 3.6 0.63 Barium D -- ug/I 170 86 95 6.8 16 140 10.7 17.5 11.2 Barium T 700 02L ug/I 174 85 102 64.6 16.7 144 11.6 20.3 9.9 Beryllium D -- ug/I 0.92 J 0.19 J 0.36 J 1 U 1 U 2 U 0.1 U 0.013 J 0.014 J Beryllium T 4 IMAC ug/I 0.85 J 1 U 1 U 1 U 0.13 J 2 U 0.1 U 0.1 U 0.018 J Boron D -- ug/I 9800 9600 11000 86 1900 11000 50 U 50 J 50 U Boron T 700 02L ug/I 11800 9790 13100 78.4 1940 12500 50 U 126 50 U Cadmium D -- ug/I 0.8 U 0.8 U 0.8 U 0.8 U 0.8 U 1.6 U 0.08 U 0.08 U 0.069 J Cadmium T 2 02L ug/I 0.8 U 0.8 U 0.8 U 0.8 U 0.8 U 1.6 U 0.08 U 0.058 J 0.08 U Calcium T -- ug/I 222000 233000 216000 51000 153000 242000 40600 26300 7680 Chloride N 250000 02L ug/I 504000 490000 466000 7500 279000 492000 3700 3000 840J Chromium D -- ug/I 5 U 5 U 5 U 3.4 J 5 U 10 U 0.42 J 1.1 1.4 Chromium T 10 02L ug/I 0.97 J+ 1.3 J 1.6 J+ 46.8 2.6 J 2.2 J+ 1.3 J+ 0.62 J+ 0.82 J+ Chromium 6+ T 0.07 DHHS ug/I 0.03 U 0.03 U 0.03 U 2.2 0.014 J 0.03 U 0.03 U 0.068 0.49 Cobalt D -- ug/I 41.2 30.3 86.1 1 U 1.1 10.5 0.016 J 0.2 0.029 J Cobalt T 1 IMAC ug/I 42.6 34 108 7 1.1 11.6 0.022 J 0.25 0.046 J Copper D -- ug/I 5 U 1.5 J 4.7 J 1.6 J 5 U 2.2 J 0.37 J 0.87 0.31 J Copper T 1000 02L ug/I 1.8 J 5 U 5 U 38.9 1.2 J 10 U 0.86 0.23 J 0.5 U Iron D -- ug/I 29 J 50 U 290 230 1300 50 U 50 U 50 U 263 Iron T 300 02L ug/I 56.1 240 1300 11300 J+ 1400 155 50 U 50 U 50 U Lead D -- ug/I 1U 1U 1U 1U 1U 2U 0.1U 0.1U 0.1U Lead T 15 02L ug/I 1U 1U 1U 11.8 1U 2U 0.1U 0.1U 0.1U Magnesium T -- ug/I 58300 64400 50800 2230 30200 67900 176 5400 2160 Manganese D -- ug/I 2200 2100 12200 73 160 3900 5 U 197 8 Manganese T 50 02L ug/I 2120 1910 15400 555 155 3780 5 U 291 6.4 Mercury D -- ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Mercury T 1 02L ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Methane N -- ug/I 10.4 3.7 J+ 14.7 J+ 295 2.3 J+ 8.1 J+ 5.1 J+ 2.8 J+ 1.7 J+ Molybdenum D -- ug/I 5 U 5 U 5 U 9.4 5.9 3.9 J 14.3 3.9 2.2 Molybdenum T - ug/I 5 U 5 U 5 U 3.4 J 6 4.7 J 14.1 10.8 2 Nickel D -- ug/I 8.3 5 U 17.4 5 U 5 U 10 U 0.53 0.55 1.1 Nickel T 100 02L ug/I 9.1 5 U 22.4 25.5 5 U 10 U 0.47 J 0.64 0.51 Nitrogen, NO2 plus NO3 N -- ug/I 20 U 20 U 20 U 20 U 20 U 20 U 20 U 63 31 Potassium T - ug/I 4400 J 4520 J 5020 2660 J 4640 J 8240 7750 2590 J 5000 U Selenium D -- ug/I 23.2 11.2 6.2 5 U 5 U 6.3 J 0.77 0.5 0.5 U Selenium T 20 02L ug/I 24.8 14.8 7 7.2 5 U 10 U 0.5 1.1 0.5 U Sodium T -- ug/I 11400 10800 13100 6920 21700 12100 14900 26300 8730 Strontium D ug/I 640 730 720 35 380 690 140 110 48 Strontium T -- ug/I 632 686 732 52.1 366 696 150 144 43 Sulfate N 250000 02L ug/I 116000 137000 81800 16300 25800 131000 15400 3900 2800 Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 UJ Thallium D -- ug/I 0.39 J 0.29 J 1 U 1 U 1 U 2 U 0.1 U 0.1 U 0.1 U Thallium T 0.2 IMAC ug/I 1 U 1 U 1 U 1 U 1 U 2 U 0.1 U 0.1 U 0.1 U Total Dissolved Solids N 500000 02L ug/I 1060000 1230000 1080000 71000 639000 1200000 171000 161000 86000 Total Organic Carbon N -- ug/I 5600 640 J 820 J 1300 1000 650 J 820 J 1000 U 1000 U Total Suspended Solids N I ug/I 2500 U 7200 6000 605000 7400 27200 15600 1 2500 U 2500 U Uranium, Natural T ug/I -- -- 1.1 J 2.8 J -- -- 0.5 U 1.1 Vanadium D ug/I 1 3 U 3 U 3 U 18.2 1 3 U 6 U 1 6.6 4.9 1 3.5 Page 1 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: AB-1D 3/30/2016 N BL-AB-1D AB-1S 3/30/2016 N BL-AB-1S AB-2D 3/30/2016 N BL-AB-2D AB-2S 3/30/2016 N BL-AB-2S AB-3D 3/30/2016 N BL-AB-3D AB-3S 3/30/2016 N BL-AB-3S AB-4BR 4/1/2016 N BL-AB-4BR AB-4D 4/1/2016 N BL-AB-4D AB-5D 3/31/2016 N BL-AB-SD Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 3 U 3 U 3 U 38.8 3 U 6 U 7 7.6 3.3 Zinc D -- ug/I 26 46 50 6.3 J 3.6 J 19 10 U 4.9 J+ 10 U Zinc T 1000 02L ug/I 20.9 23.4 61 58.3 32.5 16.8 10 U 10 U 10 U Dissolved Oxygen N I -- mg/I 0.3 0.1 0.7 0.1 0.4 0.1 0.4 0.3 3.65 Oxidation Reduction Potential N mV 23.2 136.1 110.5 -125.1 -134.1 126.1 -121.1 -78.2 149.6 pH N 6.5 - 8.5 02L SU 5.6 5.8 5.7 9.1 7.2 6.1 11.3 6.3 6.7 Specific Conductivity N PS/cm 1786 1840 1817 234.9 1146 1981 434.9 245.9 97.4 Temperature N 1 1 Deg C 16.8 22.7 14.6 20.2 18.6 18.6 18.5 20.2 21.3 Turbidity, field N -I I NTU 2.1 32.1 9.4 685 7.6 5.9 9.4 0.5 0.4 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 2 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: AB-61D 3/31/2016 N BL-AB-6D AB-7D 4/1/2016 N BL-AB-7D AB-81D 3/31/2016 N BL-AB-BD AB-9BR 4/1/2016 N BL-AB-9BR AB-91D 4/1/2016 N BL-AB-9D AB-9S 4/1/2016 N BL-AB-9S BC-23A 3/30/2016 N BL-BC-23A BC-28 3/29/2016 N BL-BC-28 BG-1 D 3/29/2016 N BL-BG-1D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 68100 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N - ug/I 47400 32700 42900 5000 U 126000 7200 17300 21700 11900 Alkalinity, lab N ug/I 47400 32700 42900 94500 126000 7200 17300 21700 11900 Aluminum D ug/I 100 U 100 U 100 U 112 100 U 100 U 61 J 100 U 100 U Aluminum T ug/I 100 U 141 100 U 618 100 U 100 U 100 U 108 100 U Antimony D ug/I 0.5 U 0.14 J 0.5 U 0.23 J 0.44 J 0.5 U 0.5 U 0.5 U 0.5 U Antimony T 1 IMAC ug/I 0.5 U 0.23 J 0.5 U 0.66 0.85 0.5 U 0.5 U 0.5 U 0.5 U Arsenic D -- ug/I 0.08 J 0.45 1.5 18.9 1.5 0.065 J 0.1 U 0.051 J 0.066 J Arsenic T 10 02L ug/I 0.083 J 0.49 J+ 1.7 21.1 1.6 0.13 0.1 U 0.13 J+ 0.076 J Barium D -- ug/I 17 17.6 9.5 9.2 6.9 52.8 28 25 3 J Barium T 700 02L ug/I 18.1 20.7 6.4 8.1 11.1 57.6 29.5 27.8 2.6 J Beryllium D -- ug/I 0.1 U 0.1 U 0.028 J 0.1 U 0.021 J 0.12 0.074 J 0.1 0.12 Beryllium T 4 IMAC ug/I 0.1 U 0.1 U 0.042 J 0.032 J 0.1 U 0.14 0.074 J 0.051 J+ 0.1 J+ Boron D -- ug/I 50 U 50 U 50 U 50 U 86.4 50 U 50 U 50 U 50 U Boron T 700 02L ug/I 50 U 50 U 29 J 50 U 103 J+ 50 U 50 U 50 U 50 U Cadmium D -- ug/I 0.082 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.19 0.08 U 0.07 J Cadmium T 2 02L ug/I 0.08 U 0.092 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.099 J+ 0.096 Calcium T -- ug/I 9790 8060 8180 43800 33200 678 1490 4700 3260 Chloride N 250000 02L ug/I 1300 3800 5800 5000 5600 5400 1900 1800 7500 Chromium D -- ug/I 2.1 0.37 J 0.23 J 0.17 J 0.68 0.14 J 0.96 0.71 0.16 J Chromium T 10 02L ug/I 0.63 J+ 2 0.17 J+ 0.7 J+ 0.84 J+ 0.2 J+ 0.89 J+ 1.1 J+ 1.6 Chromium 6+ T 0.07 DHHS ug/I 0.36 J+ 0.03 U 0.03 U 0.054 0.111 0.03 U 0.46 0.45 0.03 U Cobalt D -- ug/I 0.035 J 0.15 1.1 0.015 J 0.44 17.9 0.074 J 0.049 J 1.5 Cobalt T 1 IMAC ug/I 0.036 J 0.27 1.2 0.12 0.76 17.6 0.045 J 0.37 J+ 1.7 Copper D -- ug/I 1.9 0.17 J 0.2 J 0.93 0.12 J 1.3 1.1 J+ 3 2.1 Copper T 1000 02L ug/I 0.25 J 0.68 0.5 U 0.4 J 0.39 J 0.21 J 0.33 J 4 0.39 J Iron D -- ug/I 50 U 88.8 220 50 U 400 116 85 50 U 50 U Iron T 300 02L ug/I 78 237 137 85.4 308 135 54.5 126 50.2 Lead D -- ug/I 0.1 U 0.1 U 0.46 0.1 U 0.1 U 0.1 U 0.1 U 0.092 J 0.1 U Lead T 15 02L ug/I 0.1 U 0.16 0.1 U 0.83 0.1 U 0.1 U 0.1 U 0.48 0.1 U Magnesium T -- ug/I 2870 2250 2300 110 7860 899 848 1420 2180 Manganese D -- ug/I 7.1 10.9 86 54.7 123 616 5 U 5 U 44 Manganese T 50 02L ug/I 11.3 13.6 66.7 5.2 120 672 5 U 7.9 45.7 Mercury D -- ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 1 02L ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Methane N -- ug/I 1.6 J+ 4.8 J+ 2.4 J+ 505 5 J+ 4.2 J+ 1.7 J+ 1.5 J+ 1.7 J+ Molybdenum D -- ug/I 1.4 3.9 0.83 4.2 2.1 0.5 U 0.13 J 0.28 J 0.5 U Molybdenum T - ug/I 1.3 3.7 1.1 7.3 1.5 0.5 U 0.18 J 0.4 J+ 0.14 J Nickel D -- ug/I 1.2 2.4 6 0.5 U 1.3 1.2 1.4 1.2 4.4 Nickel T 100 02L ug/I 0.5 1.4 8.8 1.4 2.6 1.2 0.5 U 1.2 5.6 Nitrogen, NO2 plus NO3 N -- ug/I 84 20 U 260 20 U 20 U 280 20 U 1100 1400 Potassium T ug/I 5000 U 3150 J 2600 J 4820 J 3090 J 5000 U 5000 U 5000 U 3310 J Selenium D -- ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium T 20 02L ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.32 J 0.5 U 0.5 U 0.5 U Sodium T -- ug/I 8260 9090 8120 17300 10200 5030 5940 5010 6040 Strontium D ug/I 47 37.6 66 151 90.6 6.1 16 32 39 Strontium T -- ug/I 48.2 40.2 54.7 116 100 7.3 16.2 32.5 29.3 Sulfate N 250000 02L ug/I 4200 9900 1500 590 J 9900 1400 740 J 2200 2800 Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 UJ 100 U 100 U 100 UJ Thallium D -- ug/I 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.086 J 0.1 U 0.1 U 0.1 U Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.089 J 0.1 U 0.09 J 0.02 J Total Dissolved Solids N 500000 02L ug/I 64000 91000 50000 102000 169000 25000 U 27000 38000 52000 Total Organic Carbon N -- ug/I 1000 U 1000 U 1000 U 3100 1000 1000 U 1000 U 1000 U 1000 U Total Suspended Solids I N I ug/I 2500 U 5000 U 2500 U 6700 2500 U 2500 U 2500 U 2500 U 2500 U Uranium, Natural T ug/I 0.36 J - 0.5 U 0.5 U 0.31 J 0.5 U 0.5 U 0.24 J 0.5 U Vanadium D I ug/I 2.8 0.44 0.15 J 0.3 U 1 0.31 1 0.3 U 0.12 J 0.22 J 0.36 Page 3 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: AB-6D 3/31/2016 N BL-AB-6D AB-7D 4/1/2016 N BL-AB-7D AB-8D 3/31/2016 N BL-AB-BD AB-9BR 4/1/2016 N BL-AB-9BR AB-9D 4/1/2016 N BL-AB-9D AB-9S 4/1/2016 N BL-AB-9S BC-23A 3/30/2016 N BL-BC-23A BC-28 3/29/2016 N BL-BC-28 BG-1 D 3/29/2016 N BL-BG-1D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 3.1 1.3 0.15 J 0.44 0.56 0.3 U 0.089 J 0.4 0.094 J Zinc D -- ug/I 3.7 J 3.5 J+ 10 U 10 U 10 U 5.4 J+ 10 U 5.8 J+ 33 Zinc T 1000 02L ug/I 2.9 J 12.1 3 J 10 U 10 U 7.7 J 10 U 6.5 J 48.8 Dissolved Oxygen N I -- mg/I 1.5 0.8 0.3 0.5 0.4 1.2 -- -- 5.3 Oxidation Reduction Potential N - mV 100 38.5 113.3 -184.5 -56.6 312.9 215 pH N 6.5 - 8.5 02L SU 6.6 6.6 6.13 11.2 6.6 4.9 5.9 Specific Conductivity N PS/cm 108 103.3 106.7 641 255.4 53.1 77.7 Temperature N 1 1 Deg C 21 20.4 19 16.4 17.4 17.5 17.4 Turbidity, field N I I NTU 0.32 8.7 0.6 6.3 2.6 2.8 - - 1.4 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 4 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: BG-2BR 3/29/2016 N BL-BG-2BR BG-21D 3/29/2016 N BL-BG-2D BG-2S 3/29/2016 N BL-BG-2S BG-3D 3/30/2016 N BL-BG-3D BG-3S 3/30/2016 N BL-BG-3S CRW-10 3/29/2016 N BL-CRW-10 GWA-10D 3/29/2016 N BL-GWA-10D GWA-10S 3/29/2016 N BL-GWA-10S GWA-11D 3/29/2016 N BL-GWA-11 D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 12900 5000 U 5000 U 5000 U 5000 U 5000 U 177000 5000 U 5000 U Alkalinity, HCO3 N - ug/I 51700 46200 22900 19600 8700 6200 5000 U 5000 U 49500 Alkalinity, lab N ug/I 64600 46200 22900 19600 8700 6200 216000 5000 U 49500 Aluminum D ug/I 130 100 U 100 U 100 U 100 U 100 U 780 810 100 U Aluminum T ug/I 187 100 U 142 100 U 100 U 240 908 885 125 Antimony D -- ug/I 1.8 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 5 U 0.5 U 2.2 J Antimony T 1 IMAC ug/I 1.2 0.14 J 0.5 U 0.24 J 0.5 U 0.5 U 5 U 0.5 U 2 J Arsenic D -- ug/I 1.6 0.099 J 0.058 J 0.052 J 0.1 U 0.043 J 1.2 5.5 3.8 Arsenic T 10 02L ug/I 1.6 0.11 0.1 0.13 0.1 U 0.14 J+ 1.3 5.6 4.5 J+ Barium D -- ug/I 6.5 5.8 28 6.6 J+ 6.3 J+ 20 21 300 20 Barium T 700 02L ug/I 7.7 6.6 30.9 9.3 32.1 21.5 23.8 320 27.9 Beryllium D -- ug/I 0.024 J 0.012 J 0.041 J 0.046 J 0.3 0.51 1 U 1.8 0.79 J Beryllium T 4 IMAC ug/I 0.04 J+ 0.1 U 0.063 J+ 0.038 J 0.18 0.64 1 U 1.7 1 UJ Boron D -- ug/I 50 U 50 U 50 U 50 U 50 U 50 U 50 U 43 J 50 U Boron T 700 02L ug/I 50 U 50 U 50 U 50 U 50 U 50 U 50 U 47.6 J 25 J Cadmium D -- ug/I 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.062 J 0.8 U 0.18 0.8 U Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.11 J+ 0.8 U 0.24 J+ 0.8 UJ Calcium T -- ug/I 23400 13200 8030 4700 2110 22700 85200 1990 55000 Chloride N 250000 02L ug/I 4000 14800 18800 5500 1600 37500 16200 56300 141000 Chromium D -- ug/I 0.91 0.58 2.2 0.3 J+ 0.42 J+ 0.5 0.9 J 0.16 J 2.7 J Chromium T 10 02L ug/I 1.8 1.5 2.4 0.57 J+ 0.83 J+ 0.9 J+ 5 U 0.42 J+ 17.3 J Chromium 6+ T 0.07 DHHS ug/I 1.2 0.15 1 0.042 0.26 0.29 0.13 0.01 J 0.019 J+ Cobalt D -- ug/I 0.026 J 0.016 J 0.017 J 0.023 J 0.27 0.34 1 U 40.7 2.4 Cobalt T 1 IMAC ug/I 0.068 J+ 0.045 J+ 0.085 J+ 0.061 J 0.34 0.52 J+ 1 U 42.2 3.2 J Copper D -- ug/I 5.5 0.49 J 1.4 0.52 J+ 2.4 2.7 5.8 11.6 3.2 J Copper T 1000 02L ug/I 8.9 0.21 J 0.24 J 0.22 J 0.27 J 1.3 5 U 1.6 5 U Iron D -- ug/I 50 U 50 U 50 U 50 U 50 U 35 J 50 U 50 U 1000 Iron T 300 02L ug/I 52.2 50 U 234 46.5 J 51.9 368 50 U 33.7 J 1410 Lead D -- ug/I 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 1U 0.8 1U Lead T 15 02L ug/I 0.12 0.1 U 0.11 0.1 U 0.1 U 0.19 1 U 0.83 1 U Magnesium T -- ug/I 1650 7030 4230 2050 1300 8020 272 7990 21300 Manganese D -- ug/I 5 U 5 U 5 U 3.4 J+ 3.3 J+ 14 5 U 1000 220 Manganese T 50 02L ug/I 4.1 J 5 U 5.1 3.2 J 15.9 21.1 5 U 1110 221 Mercury D -- ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.54 0.2 U Mercury T 1 02L ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.7 0.2U Methane N -- ug/I 2.1 J+ 1.8 J+ 1.6 J+ 1.6 J+ 1.7 J+ 1.4 J+ 1.8 J+ 1.6 J+ 3.3 J+ Molybdenum D -- ug/I 9.3 0.57 0.12 J 0.5 U 0.5 U 0.5 U 2.9 J 0.5 U 2.4 J Molybdenum T - ug/I 9.3 0.63 0.17 J 0.5 U 0.5 U 0.17 J+ 2.8 J 0.5 U 2.8 J Nickel D -- ug/I 0.52 0.91 1.5 0.5 U 1.6 0.88 5 U 10.4 24.5 Nickel T 100 02L ug/I 1.1 1.3 1.5 0.47 J 0.93 0.92 5 U 10.6 29.2 Nitrogen, NO2 plus NO3 N -- ug/I 150 720 670 2800 2000 600 27 280 69 Potassium T ug/I 10200 5000 U 5000 U 5000 U 5000 U 3540 J 19700 3400 J 8470 Selenium D -- ug/I 0.94 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 5 U 55.8 5 U Selenium T 20 02L ug/I 0.86 0.5 U 0.5 U 0.5 U 0.5 U 0.5 5 U 55.5 5 U Sodium T -- ug/I 9870 6600 7030 7630 3300 J 8570 15500 11600 20600 Strontium D ug/I 190 33 47 47 J+ 47 J+ 110 590 17 290 Strontium T -- ug/I 202 34 48 50.6 20.6 110 640 18 286 Sulfate N 250000 02L ug/I 21100 2900 950 J 790 J 640 J 37700 2200 1400 6800 Sulfide N -- ug/I 100 UJ 100 UJ 100 UJ 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 1U 0.18 1U Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.045 J 1 U 0.22 1 U Total Dissolved Solids N 500000 02L ug/I 121000 96000 90000 48000 25000 U 157000 249000 109000 445000 Total Organic Carbon N -- ug/I 600 J 1000 U 1000 U 1000 U 8200 1000 U 1000 U 1000 U 1000 U Total Suspended Solids N I ug/I 5000 U 2500 U 5100 2500 U 3100 6200 9300 2500 U 5000 U Uranium, Natural T ug/I 1.8 0.067 J 0.5 U 0.5 U 0.5 U 0.36 J 5 U 0.53 0.5 U Vanadium D ug/I 7.3 1 1.1 0.64 0.34 1 0.082 J 0.36 2 J 0.3 U I3 U Page 5 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: BG-2BR 3/29/2016 N BL-BG-2BR BG-2D 3/29/2016 N BL-BG-2D BG-2S 3/29/2016 N BL-BG-2S BG-3D 3/30/2016 N BL-BG-3D BG-3S 3/30/2016 N BL-BG-3S CRW-10 3/29/2016 N BL-CRW-10 GWA-10D 3/29/2016 N BL-GWA-10D GWA-10S 3/29/2016 N BL-GWA-10S GWA-11D 3/29/2016 N BL-GWA-11 D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 7.1 1.1 1 0.42 0.18 J 0.96 1.9 J 0.3 U 3 U Zinc D -- ug/I 65 20 20 2.9 J+ 2.7 J+ 6.7 J+ 10 U 32 12 J+ Zinc T 1000 02L ug/I 72.8 28.5 10.6 10 U 9.3 J 16.2 2.9 J 26.2 24.8 Dissolved Oxygen N I -- mg/I 2.4 2.3 6.1 6.3 6.4 -- -- -- 0.5 Oxidation Reduction Potential N - mV 198.3 124.4 194 185.2 234.6 - - -89.4 pH N 6.5 - 8.5 02L SU 9.6 6.4 5.9 5.9 5.3 - - 6.4 Specific Conductivity N PS/cm 198.3 144.8 117.8 82.4 45.7 -- - -- 663 Temperature N I IDeg C 13.4 14 17.9 14.6 17 - - - 17 Turbidity, field N I I NTU 3.8 1 7.1 2.8 7.9 - - - 6 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 6 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-11S 3/29/2016 N BL-GWA-11S GWA-11S 3/29/2016 FD BL-GWA-11S-FD GWA-12BR 4/1/2016 N BL-GWA-12BR GWA-12BR 4/1/2016 FD BL-GWA-12BR-FD GWA-12D 3/29/2016 N BL-GWA-12D GWA-12S 4/1/2016 N BL-GWA-12S GWA-16BR 4/28/2016 N BL-GWA-16BR GWA-16D 3/30/2016 N BL-GWA-16D GWA-16S 3/31/2016 N BL-GWA-16S Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 188000 111000 5000 U Alkalinity, HCO3 N - ug/I 1200 J 5000 U 79600 78100 34900 22800 75400 5000 U 5500 Alkalinity, lab N ug/I 1200 J 5000 U 79600 78100 34900 22800 263000 201000 5500 Aluminum D ug/I 200 180 100 U 100 U 100 U 108 961 500 100 U Aluminum T ug/I 220 208 100 U 100 U 53.6 J 345 1110 512 449 Antimony D ug/I 0.5 U 0.5 U 0.13 J 0.12 J 0.5 U 2.3 11.5 1.2 J 0.11 J Antimony T 1 IMAC ug/I 0.5 U 0.5 U 0.21 J 0.19 J 0.15 J 0.72 10.1 5 U 0.11 J Arsenic D -- ug/I 0.47 0.46 0.71 0.69 0.075 J 0.15 9.3 1.2 0.1 U Arsenic T 10 02L ug/I 0.5 0.52 1 J 0.76 J 0.17 0.23 9.2 1.1 0.19 Barium D -- ug/I 330 300 5 U 5 U 12 16.8 19.3 29 30 Barium T 700 02L ug/I 333 334 2.9 J 5 U 12.4 23.6 16.4 30.4 33.6 Beryllium D -- ug/I 7.2 6.4 0.02 J 0.1 U 0.012 J 0.48 1 U 1 U 0.075 J Beryllium T 4 IMAC ug/I 6.8 J 7.3 J 0.1 U 0.04 J 0.055 J+ 0.15 1 U 1 U 0.12 Boron D -- ug/I 180 160 50 U 50 U 50 U 50 U 50 U 28 J 25 J Boron T 700 02L ug/I 185 185 50 U 50 U 50 U 50 U 27.8 J 50 U 50 U Cadmium D -- ug/I 0.38 0.34 0.08 U 0.08 U 0.08 U 0.095 0.8 U 0.8 U 0.08 U Cadmium T 2 02L ug/I 0.38 J+ 0.37 J+ 0.08 U 0.08 U 0.058 J 0.064 J 0.8 U 0.8 U 0.051 J Calcium T -- ug/I 15000 15300 18000 18000 4380 2810 64100 6290 303 Chloride N 250000 02L ug/I 95000 98300 1300 1200 1700 1200 4600 1800 690J Chromium D -- ug/I 0.23 J+ 0.23 J+ 0.17 J+ 0.35 J+ 0.17 J 0.57 J+ 45.8 1.2 J 0.51 Chromium T 10 02L ug/I 0.19 J 0.21 J+ 0.32 J+ 0.26 J+ 0.7 J+ 3.4 J+ 51.4 1.6 J 22.7 Chromium 6+ T 0.07 DHHS ug/I 0.03 U 0.13 J+ 0.03 U 0.03 U 0.042 0.03 U 1.1 0.65 0.041 Cobalt D -- ug/I 11.1 11.4 0.022 J 0.025 J 0.15 0.6 0.43 J 1 U 2.7 Cobalt T 1 IMAC ug/I 11.2 J 11.1 J 0.047 J 0.029 J 0.12 J+ 0.44 0.53 J 1 U 3.3 Copper D -- ug/I 10.3 J 5.4 J 0.5 U 0.17 J+ 0.47 J 21.8 4.6 J 5 U 1.5 Copper T 1000 02L ug/I 0.76 0.74 1 0.63 0.62 8.3 4.4 J 5 U 2.2 Iron D -- ug/I 50 U 50 U 52.4 278 50 U 88.5 334 50 U 29 J Iron T 300 02L ug/I 26.5 J 50 U 145 103 39.5 J 332 374 28.4 J 957 Lead D -- ug/I 0.11 0.1 U 0.1 U 0.1 U 0.1 U 0.28 1 U 1 U 0.1 U Lead T 15 02L ug/I 0.11 0.12 0.1 U 0.1 U 0.1 0.71 1 U 1 U 0.51 Magnesium T -- ug/I 18100 18200 4450 4510 1830 1040 112 77.8 J 929 Manganese D -- ug/I 180 200 43.7 44.6 63 57.2 7 5 U 70 Manganese T 50 02L ug/I 178 166 50 49.2 50.8 48.1 8.4 5 U 70.4 Mercury D -- ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 1 02L ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Methane N -- ug/I 1.6 J+ 1.5 J+ 3.6 J+ 2.7 J+ 1.8 J+ 1.9 J+ 10 U 2.5 J+ 1.8 J+ Molybdenum D -- ug/I 0.5 U 0.5 U 6.2 6.1 0.87 0.59 12.4 12.8 0.5 U Molybdenum T - ug/I 0.5 U 0.5 U 7.2 6.1 1.4 0.39 J 14.5 14.1 0.64 Nickel D -- ug/I 12.3 12.1 0.5 U 0.5 U 0.5 U 1.9 22 5 U 3.3 Nickel T 100 02L ug/I 11.6 11.6 0.55 0.5 U 0.86 0.92 26.4 5 U 14.3 Nitrogen, NO2 plus NO3 N -- ug/I 230 240 20 U 20 U 29 310 210 67 11 J Potassium T ug/I 4290 J 4330 J 2750 J 5000 U 5000 U 5000 U 18000 71500 5000 U Selenium D -- ug/I 5.8 5 0.5 U 0.5 U 0.5 U 0.5 U 5 U 5 U 0.5 U Selenium T 20 02L ug/I 5.8 6.3 0.5 U 0.5 U 0.5 U 0.44 J 5 U 5 U 0.58 Sodium T -- ug/I 13600 13900 8720 7890 8000 5330 97200 53100 5000 U Strontium D ug/I 170 160 39 39.1 23 31.2 602 390 7.2 Strontium T -- ug/I 172 174 44.2 45.6 24.8 26.6 551 381 7.5 Sulfate N 250000 02L ug/I 1000 U 1000 6200 6200 1900 1100 77600 19900 820 J+ Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.24 0.21 0.1 U 0.1 U 0.1 U 0.1 U 1 U 1 U 0.038 J Thallium T 0.2 IMAC ug/I 0.23 0.23 0.1 U 0.1 U 0.1 U 0.1 U 1 U 1 U 0.036 J Total Dissolved Solids N 500000 02L ug/I 225000 236000 103000 97000 59000 57000 396000 255000 25000 U Total Organic Carbon N -- ug/I 11600 J 1000 UJ 1000 U 1000 U 1000 U 1000 U 3600 900 J 1000 U Total Suspended Solids N I ug/I 2500 U 2500 U 2500 U 2500 U 2500 U 32800 18900 2500 U 6900 Uranium, Natural T ug/I 0.099 J 0.1 J 0.58 0.6 0.5 U 0.08 J 5 U -- -- Vanadium D ug/I 1 0.3 U 1 0.3 U 1 0.3 U 1 0.3 U 1 0.34 1 0.41 1 11.5 1 2.5 J 1 0.073 J Page 7 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-11S 3/29/2016 N BL-GWA-11S GWA-11S 3/29/2016 FD BL-GWA-11S-FD GWA-12BR 4/1/2016 N BL-GWA-12BR GWA-12BR 4/1/2016 FD BL-GWA-12BR-FD GWA-12D 3/29/2016 N BL-GWA-12D GWA-12S 4/1/2016 N BL-GWA-12S GWA-16BR 4/28/2016 N BL-GWA-16BR GWA-16D 3/30/2016 N BL-GWA-16D GWA-16S 3/31/2016 N BL-GWA-16S Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 0.3 U 0.3 U 0.18 J 0.16 J 0.46 1.3 13.3 3.6 2.1 Zinc D -- ug/I 47 44 4.2 J+ 3.4 J+ 16 31.3 3 J 3.8 J 47 Zinc T 1000 02L ug/I 40.2 39.3 11.5 12.4 27.6 8.8 J 10 U 3.9 J 44 Dissolved Oxygen N I -- mg/I 5 5 0.7 0.7 3.7 5 0.9 4.7 Oxidation Reduction Potential N - mV 174 174 -146.3 -146.3 172.8 188 -116.3 294.8 pH N 6.5 - 8.5 02L SU 5 5 7.6 7.6 6.4 6 11.2 4.7 Specific Conductivity N PS/cm 362 362 173.4 173.4 79.2 56.5 832 20.6 Temperature N Deg C 16.1 16.1 16.5 16.5 17.1 21.5 18.8 18.7 Turbidity, field I N NTU 2.1 2.1 2.1 2.1 1.8 29.6 4.5 9.7 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 8 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-17D 3/30/2016 N BL-GWA-17D GWA-17S 3/31/2016 N BL-GWA-17S GWA-18D 3/31/2016 N BL-GWA-18D GWA-18S 4/27/2016 N BL-GWA-18S GWA-19D 4/28/2016 N BL-GWA-19D GWA-19S 3/31/2016 N BL-GWA-19S GWA-1D 4/1/2016 N BL-GWA-1D GWA-1S 4/1/2016 N BL-GWA-1S GWA-20D 3/30/2016 N BL-GWA-20D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N - ug/I 54600 21900 53000 21900 46000 5000 U 44600 5000 U 17200 Alkalinity, lab N ug/I 54600 21900 53000 21900 46000 5000 U 44600 5000 U 17200 Aluminum D ug/I 60 J 54 J 88 J+ 100 U 4180 1200 88.5 J 115 100 U Aluminum T ug/I 82.6 J 127 133 170 1780 1260 176 1210 147 Antimony D ug/I 0.28 J 0.5 U 0.21 J 0.5 U 0.34 J 0.12 J 0.98 0.5 U 5 U Antimony T 1 IMAC ug/I 0.21 J 0.5 U 0.3 J 0.5 U 0.28 J 0.12 J 1.3 0.5 U 5 U Arsenic D -- ug/I 0.21 0.072 J 1.3 1.9 10 3.8 1.9 0.078 J 2.1 Arsenic T 10 02L ug/I 0.29 0.1 1.8 2.2 6.1 4.4 2 1.6 2.6 Barium D -- ug/I 6.1 29 2.5 J+ 23.6 16.2 530 5.6 124 63 Barium T 700 02L ug/I 7 34.6 2.8 J 30.7 8.7 519 4.6 J 124 69.8 Beryllium D -- ug/I 0.028 J 0.028 J 0.025 J 0.049 J 0.31 7.4 0.021 J 3.5 0.42 J Beryllium T 4 IMAC ug/I 0.14 0.018 J 0.014 J+ 0.066 J+ 0.23 J+ 7.3 0.072 J+ 3.3 0.12 J Boron D -- ug/I 50 U 25 J 50 U 68 50 U 1300 50 U 261 5300 Boron T 700 02L ug/I 50 U 26.1 J 50 U 28 J 50 U 1300 29.6 J 254 5990 Cadmium D -- ug/I 0.21 0.11 0.08 U 0.052 J 0.08 U 0.45 0.05 J 0.14 0.67 J Cadmium T 2 02L ug/I 0.08 U 0.16 0.08 U 0.08 U 0.08 U 0.55 0.15 0.16 0.63 J Calcium T -- ug/I 19000 4510 16100 3440 11100 15100 6400 2040 118000 Chloride N 250000 02L ug/I 950J 1200 7200 21500 3000 159000 50300 36900 369000 Chromium D -- ug/I 1.4 1.4 1.4 0.42 J+ 14.5 3.9 4.7 1.3 5 U Chromium T 10 02L ug/I 1.4 J+ 5.9 3.1 1.3 J+ 13.5 6.2 11.1 11.2 1.6 J Chromium 6+ T 0.07 DHHS ug/I 0.03 J 2.2 0.47 0.09 U 0.03 U 0.025 J 0.047 0.063 0.03 U Cobalt D -- ug/I 0.071 J 16.1 0.53 13.5 4.3 37.5 6 6.8 8.5 Cobalt T 1 IMAC ug/I 0.13 16.8 0.65 20.6 1.6 42.7 5.2 7.6 9.6 Copper D -- ug/I 16.8 4.6 1.1 1.5 8.1 6.1 1 3.5 3.9 J Copper T 1000 02L ug/I 215 9.9 1.3 0.72 11.9 4.4 0.95 4.6 1.6 J Iron D -- ug/I 80 250 55 J+ 832 6970 30 J 112 50 U 600 Iron T 300 02L ug/I 828 266 136 1400 2550 97.3 167 1700 1130 Lead D -- ug/I 0.1 U 0.1 U 0.1 U 0.13 1.3 0.34 0.32 0.14 1 U Lead T 15 02L ug/I 0.096 J 0.1 U 0.1 U 0.19 0.58 0.4 0.5 1 1 U Magnesium T -- ug/I 1660 4100 2120 2840 4020 25500 2840 10400 53600 Manganese D -- ug/I 15 360 33 J+ 1810 69.4 1200 16.6 214 980 Manganese T 50 02L ug/I 15 330 35.8 2550 68.2 1230 21.6 240 1040 Mercury D -- ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 1 02L ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Methane N -- ug/I 3.8 J+ 2.5 J+ 1.9 J+ 10 U 10 U 1.6 J+ 2.2 J+ 1.6 J+ 3.1 J+ Molybdenum D -- ug/I 2 2.8 1.7 0.37 J 9.5 0.5 U 4 0.5 U 3.1 J Molybdenum T - ug/I 7.4 6.3 2.1 0.45 J 6.3 0.5 U 5 0.25 J 3.1 J Nickel D -- ug/I 2.1 17 1.7 7.4 16.2 24.9 19.3 14.2 15.5 Nickel T 100 02L ug/I 1.2 19.8 1.9 11.1 6 32.5 15.8 17 15.6 Nitrogen, NO2 plus NO3 N -- ug/I 20 U 11 J 220 J+ 20 U 20 U 120 J+ 870 1100 101 Potassium T ug/I 5000 U 3110 J 2850 J 14800 4510 J 6140 2830 J 5000 U 10400 Selenium D -- ug/I 0.5 U 0.57 0.5 U 0.5 U 0.59 44.3 0.45 J 0.69 5 U Selenium T 20 02L ug/I 0.5 U 0.54 0.5 U 0.53 0.31 J 53.8 0.64 0.79 5 U Sodium T -- ug/I 6070 5090 10600 13500 9740 9820 50200 5170 36500 Strontium D ug/I 57 20 84 J+ 22.2 53.2 91 57.6 47.9 670 Strontium T -- ug/I 59.2 21.1 84.3 24.2 61.9 92.1 44.6 46.5 724 Sulfate N 250000 02L ug/I 13300 19500 5800 9400 9500 740 J 6400 650 J 44100 Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.1 U 0.1 U 0.016 J 0.12 0.25 0.35 0.1 U 0.14 1 U Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 0.1 U 0.16 0.089 J+ 0.34 0.018 J 0.15 1 U Total Dissolved Solids N 500000 02L ug/I 83000 49000 79000 125000 95000 251000 180000 75000 814000 Total Organic Carbon N -- ug/I 1000 U 1000 U 580 J 1800 5200 1000 U 1000 U 1000 U 550 J Total Suspended Solids I N I ug/I 6700 2500 U 2500 U 61600 46000 2500 U 14000 11700 3900 Uranium, Natural T ug/I 0.25 J 0.5 U 0.83 0.084 J 0.2 J 0.14 J 0.35 J 0.084 J 5 U Vanadium D I ug/I 0.38 1 0.2 J 1.3 1 0.12 J 1 13.5 1 0.3 U 1 0.74 1 0.3 U 3 U Page 9 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-17D 3/30/2016 N BL-GWA-17D GWA-17S 3/31/2016 N BL-GWA-17S GWA-18D 3/31/2016 N BL-GWA-18D GWA-18S 4/27/2016 N BL-GWA-18S GWA-19D 4/28/2016 N BL-GWA-19D GWA-19S 3/31/2016 N BL-GWA-19S GWA-1D 4/1/2016 N BL-GWA-1D GWA-1S 4/1/2016 N BL-GWA-1S GWA-20D 3/30/2016 N BL-GWA-20D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 0.62 0.34 2 0.38 3.5 0.13 J+ 0.87 1.7 3 U Zinc D -- ug/I 86 56 4.1 J+ 7.6 J 29.4 42 11.2 J+ 16.6 J+ 61 Zinc T 1000 02L ug/I 53.2 65.8 5.8 J 8 J 50.5 41.4 5.6 J 32.6 70.1 Dissolved Oxygen N I -- mg/I 1.1 0.9 3.7 -- -- 5.1 1.8 7.1 0.8 Oxidation Reduction Potential N - mV 44.9 139.3 21.6 366 87.3 300.5 -19.9 pH N 6.5 - 8.5 02L SU 8.2 6 8.1 4.4 6.7 5 5.7 Specific Conductivity N PS/cm 150 91 150.4 559.8 284 137.9 1330 Temperature N Deg C 17.9 18.8 18.7 16.4 17.4 18.6 20.4 Turbidity, field I N NTU 9.41 9.2 1.8 7.6 7.2 8.2 7.1 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 10 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-21D 3/30/2016 N BL-GWA-21D GWA-21S 3/30/2016 N BL-GWA-21S GWA-23D 4/27/2016 N BL-GWA-23D GWA-23S 4/28/2016 N BL-GWA-23S GWA-23S 4/28/2016 FD BL-GWA-23S-FD GWA-24D 4/27/2016 N BL-GWA-24D GWA-2D 4/1/2016 N BL-GWA-21) GWA-2S 4/1/2016 N BL-GWA-2S GWA-3D 3/29/2016 N BL-GWA-3D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N - ug/I 7500 2400 J 116000 48900 48800 14100 30200 5200 31200 Alkalinity, lab N ug/I 7500 2400 J 116000 48900 48800 14100 30200 5200 31200 Aluminum D ug/I 100 U 170 100 U 100 U 100 U 100 U 100 U 100 U 100 U Aluminum T ug/I 59.8 J 228 111 791 489 69.3 J 100 U 154 115 Antimony D ug/I 0.5 U 0.5 U 5 U 5 U 5 U 0.5 U 0.5 U 0.13 J 0.19 J Antimony T 1 IMAC ug/I 0.5 U 0.5 U 0.21 J 0.52 0.39 J 0.5 U 0.12 J 0.5 U 0.11 J Arsenic D -- ug/I 0.45 0.4 1 U 1 U 1 U 0.16 3.8 0.064 J 0.065 J Arsenic T 10 02L ug/I 0.47 0.58 0.29 0.59 0.36 0.16 4.1 0.45 0.12 J+ Barium D -- ug/I 5 U 240 121 103 103 6.5 5 U 13.9 19 Barium T 700 02L ug/I 114 260 126 117 112 7.4 5 U 15.2 20.9 Beryllium D -- ug/I 2.4 5.9 0.25 J+ 0.43 J 0.17 J 0.13 0.069 J 0.24 0.1 U Beryllium T 4 IMAC ug/I 2.6 6.3 0.087 J+ 0.19 J+ 0.073 J+ 0.1 J+ 0.025 J 0.22 0.042 J+ Boron D -- ug/I 50 U 48 J 3170 649 648 102 50 U 50 U 50 U Boron T 700 02L ug/I 44.2 J 48.6 J 3540 703 692 50 U 50 U 50 U 50 U Cadmium D -- ug/I 0.55 0.39 0.8 U 0.8 U 0.8 U 0.065 J 0.08 U 0.08 U 0.08 U Cadmium T 2 02L ug/I 0.58 0.38 0.093 0.22 0.19 0.088 0.08 U 0.08 U 0.08 U Calcium T -- ug/I 24700 10200 204000 55800 55800 10700 4500 175 12000 Chloride N 250000 02L ug/I 138000 104000 8300 6200 6200 36400 1500 1400 10400 Chromium D -- ug/I 0.19 J 0.27 J 0.93 J+ 5 U 5 U 0.69 J+ 0.3 J 0.77 1.2 Chromium T 10 02L ug/I 0.73 J+ 0.64 J+ 0.82 J+ 1.1 J+ 0.73 J+ 4.9 0.73 J+ 5.1 2.2 J+ Chromium 6+ T 0.07 DHHS ug/I 0.078 0.03 U -- 0.03 U 0.03 U 0.18 0.078 0.043 0.65 Cobalt D -- ug/I 2.1 24 22.9 34.1 36.1 0.77 0.88 0.39 0.057 J Cobalt T 1 IMAC ug/I 2.3 29 27.4 33.9 33.5 1.2 1 0.51 0.16 J+ Copper D -- ug/I 3.2 9.5 3.3 J 5 U 1.5 J+ 0.37 J+ 0.6 0.87 0.92 Copper T 1000 02L ug/I 0.93 1.1 3.7 J+ 0.68 J+ 0.4 J+ 0.35 J 0.29 J 0.68 0.57 Iron D -- ug/I 50 U 35 J 8100 423 413 50 U 50 U 50 U 50 U Iron T 300 02L ug/I 44 J 90 9140 1460 J 998 J 136 48.7 J 220 156 Lead D -- ug/I 0.1 U 0.098 J 1 U 1 U 1 U 0.17 0.1 U 0.1 U 0.1 U Lead T 15 02L ug/I 0.1 U 0.15 0.1 U 0.41 0.27 0.1 U 0.1 U 0.16 0.12 Magnesium T -- ug/I 21400 18800 112000 37900 37800 5640 2170 416 1140 Manganese D -- ug/I 5 U 560 381 2010 2030 51.1 41.2 13.6 8.6 Manganese T 50 02L ug/I 83.5 559 459 2260 2150 74.1 50.1 17.4 9.7 Mercury D -- ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 1 02L ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Methane N -- ug/I 1.8 J+ 2.2 J+ 10.8 10 U 10 U 10 U 4.6 J+ 1.6 J+ 1.5 J+ Molybdenum D -- ug/I 0.5 U 0.5 U 1.8 J 1.9 J 2 J 0.24 J 1.1 0.5 U 0.5 U Molybdenum T - ug/I 0.14 J 0.5 U 2.4 2.1 2.1 0.33 J 1.2 0.15 J 0.13 J+ Nickel D -- ug/I 6.5 11.5 8 8.3 9.4 1.8 2.3 1.1 0.7 Nickel T 100 02L ug/I 6.5 13.2 8.4 8.8 8.4 4.2 2.4 3.7 1.3 J+ Nitrogen, NO2 plus NO3 N -- ug/I 460 250 1400 230 220 28 48 63 1700 Potassium T ug/I 6050 4110 J 9380 5410 5440 3540 J 5000 U 5000 U 3220 J Selenium D -- ug/I 0.5 U 4.5 6.6 3.4 J 5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium T 20 02L ug/I 0.5 U 5.4 6.6 6.3 5.1 0.5 U 0.5 U 0.5 U 0.5 U Sodium T -- ug/I 25000 19500 51100 33800 34000 9610 5870 2640J 8590 Strontium D ug/I 5 U 140 675 247 250 78.1 23.8 3.1 J 100 Strontium T -- ug/I 304 145 729 276 267 83.2 27.1 3.2 J 101 Sulfate N 250000 02L ug/I 2300 1000 881000 313000 311000 4800 1500 780 J 810 J+ Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.15 0.16 1 U 1 U 1 U 0.1 U 0.1 U 0.039 J 0.1 U Thallium T 0.2 IMAC ug/I 0.17 0.19 0.1 U 0.04 J 0.034 J 0.1 U 0.1 U 0.046 J 0.1 U Total Dissolved Solids N 500000 02L ug/I 226000 186000 1470000 554000 550000 130000 59000 25000 U 84000 Total Organic Carbon N -- ug/I 1000 U 1000 U 1400 1200 1000 1000 U 1000 U 7100 11200 Total Suspended Solids N I ug/I 2500 U 2500 U 10900 6900 2700 2600 2500 U 48300 2800 Uranium, Natural T ug/I 0.5 U 0.5 U 4.8 J 4.5 4.1 1 0.13 J 0.5 U 0.16 J 0.5 U Vanadium D ug/I 1 0.073 J 1 0.3 U 1 3 U 1 3 U 1 3 U 1 0.072 J 1 0.36 0.3 U 0.44 Page 11 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-21D 3/30/2016 N BL-GWA-21D GWA-21S 3/30/2016 N BL-GWA-21S GWA-23D 4/27/2016 N BL-GWA-23D GWA-23S 4/28/2016 N BL-GWA-23S GWA-23S 4/28/2016 FD BL-GWA-23S-FD GWA-24D 4/27/2016 N BL-GWA-24D GWA-2D 4/1/2016 N BL-GWA-21) GWA-2S 4/1/2016 N BL-GWA-2S GWA-3D 3/29/2016 N BL-GWA-3D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 0.12 J 0.12 J 0.82 J+ 1.3 0.77 0.16 J 0.44 0.18 J 0.64 Zinc D -- ug/I 10 U 20 6.4 J 15 16.5 10 U 6.5 J+ 5.6 J+ 8.3 J+ Zinc T 1000 02L ug/I 7.7 J 20 10.2 34 20.4 J+ 3.2 J 5.7 J 5.3 J 6 J Dissolved Oxygen N I -- mg/I 2.6 4.9 0.9 -- -- -- 1.5 4.54 5.95 Oxidation Reduction Potential N - mV 194.9 127.8 -180 - 76.5 189.1 147.7 pH N 6.5 - 8.5 02L SU 5.1 4.8 6.3 - 6.3 5.3 6.1 Specific Conductivity N PS/cm 505.4 375.9 1713 - 71.5 21.3 119.6 Temperature N 1 1 Deg C 16.1 15.1 18.2 - 17.2 18.3 15.8 Turbidity, field N I I NTU 2.4 1.4 3.3 -- 5.43 75.25 8.46 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 12 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-4D 3/29/2016 N BL-GWA-4D GWA-5BR2 3/29/2016 N BL-GWA-5BR GWA-5D 3/29/2016 N BL-GWA-SD GWA-5S 3/29/2016 N BL-GWA-SS GWA-6D 3/30/2016 N BL-GWA-61) GWA-6S 3/30/2016 N BL-GWA-6S GWA-7D 3/30/2016 N BL-GWA-7D GWA-7S 3/30/2016 N BL-GWA-7S GWA-8D 3/30/2016 N BL-GWA-BD Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 1200 J 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N - ug/I 125000 58000 132000 29000 135000 5200 119000 3200 J 66500 Alkalinity, lab N ug/I 125000 59200 132000 29000 135000 5200 119000 3200 J 66500 Aluminum D ug/I 100 U 100 U 100 U 100 U 100 U 88 J 100 U 130 100 U Aluminum T ug/I 100 U 100 U 100 U 270 100 U 177 100 U 290 100 U Antimony D ug/I 0.22 J 0.64 0.1 J 0.5 U 0.5 U 0.5 U 0.28 J 0.5 U 0.26 J Antimony T 1 IMAC ug/I 0.4 J 0.75 0.14 J 0.1 J 0.5 U 0.2 J 0.35 J 0.5 U 0.32 J Arsenic D -- ug/I 0.41 0.5 0.13 0.1 U 2.1 0.1 2.6 0.097 J 0.83 Arsenic T 10 02L ug/I 0.72 0.58 0.14 0.09 J 2.4 0.18 2.8 0.13 0.71 Barium D -- ug/I 36 14 8 14 18 81 11 210 7.6 Barium T 700 02L ug/I 28.2 15 8.5 17 16.7 84.1 11.5 210 6.4 Beryllium D -- ug/I 0.1 U 0.011 J 0.1 U 0.039 J 0.1 U 1.7 0.1 U 4.2 0.13 Beryllium T 4 IMAC ug/I 0.1 U 0.012 J+ 0.027 J+ 0.033 J+ 0.1 U 2 0.048 J+ 4.8 0.1 U Boron D -- ug/I 50 U 34 J 50 U 50 U 50 U 26 J 50 U 92 50 U Boron T 700 02L ug/I 50 U 36.1 J 50 U 50 U 50 U 25.4 J 50 U 93.2 50 U Cadmium D -- ug/I 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.81 0.08 U 0.11 0.1 Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.8 0.08 U 0.12 0.08 U Calcium T -- ug/I 33200 22600 32400 7850 30300 3780 32500 1610 15800 Chloride N 250000 02L ug/I 6800 5600 4100 2700 2900 10000 19600 22900 5500 Chromium D -- ug/I 1.1 0.12 J 0.34 J 0.28 J 0.22 J 0.32 J 0.94 0.97 0.28 J Chromium T 10 02L ug/I 2.3 0.25 J+ 0.34 J+ 0.44 J+ 0.42 J+ 1.2 1.6 1.5 0.43 J+ Chromium 6+ T 0.07 DHHS ug/I 1.8 0.015 J 0.03 U 0.12 J- 0.03 U 0.22 0.84 0.64 J- 0.03 U Cobalt D -- ug/I 0.16 0.1 U 0.58 0.27 0.24 4.6 0.02 J 21.7 0.15 Cobalt T 1 IMAC ug/I 0.088 J+ 0.018 J+ 0.6 0.36 0.34 2.7 0.051 J 24.9 0.092 J Copper D -- ug/I 0.5 J 0.12 J 0.32 J 0.67 0.5 U 1.4 1.7 3 0.19 J Copper T 1000 02L ug/I 0.65 J+ 0.28 J+ 0.49 J+ 0.51 J+ 0.16 J 0.49 J 2.8 1.9 0.34 J Iron D -- ug/I 50 U 31 J+ 50 U 50 U 330 42 J 50 U 50 U 890 Iron T 300 02L ug/I 50 U 50 U 30 J 348 395 204 39 J 278 1090 Lead D -- ug/I 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.21 Lead T 15 02L ug/I 0.1 U 0.17 0.1 U 0.19 0.1 U 0.26 0.1 U 0.16 0.095 J Magnesium T -- ug/I 3730 2270 6540 1240 6940 3260 8650 8100 3590 Manganese D -- ug/I 15 J+ 15 J+ 1200 160 220 570 5 U 310 73 Manganese T 50 02L ug/I 12.3 8.4 1180 145 192 541 5 U 283 59.5 Mercury D -- ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 1 02L ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Methane N -- ug/I 1.9 J+ 22.3 1.8 J+ 1.7 J+ 10 J+ 1.6 J+ 0.93 J+ 1.7 J+ 3.9 J+ Molybdenum D -- ug/I 0.46 J 29.2 4.8 0.14 J 8.2 0.5 U 2.6 0.5 U 2.7 Molybdenum T - ug/I 0.89 31.3 4.8 0.13 J 10.7 0.5 U 3 0.5 U 2 Nickel D -- ug/I 0.5 U 0.5 U 1.8 0.52 0.5 U 4.3 0.5 U 11.5 0.5 U Nickel T 100 02L ug/I 0.6 0.5 U 1.8 0.48 J 0.56 4.5 0.5 13.3 0.5 U Nitrogen, NO2 plus NO3 N -- ug/I 590 95 2300 2000 20 U 670 370 31 J+ 20 U Potassium T ug/I 5000 U 4120 J 5000 U 5000 U 3350 J 3170 J 5180 5000 U 3000 J Selenium D -- ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.59 0.5 U 1.2 0.5 U Selenium T 20 02L ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.68 0.39 J 1.3 0.5 U Sodium T -- ug/I 18100 16900 17600 6080 16300 3670J 15700 10100 11800 Strontium D ug/I 210 110 150 78 100 27 200 19 63 Strontium T -- ug/I 185 122 152 80 92.8 26.8 186 18.1 56.8 Sulfate N 250000 02L ug/I 2100 9200 3700 1000 U 4100 11600 7600 22800 9000 Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.24 0.1 U 0.082 J 0.075 J Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.23 0.1 U 0.038 J 0.1 U Total Dissolved Solids N 500000 02L ug/I 162000 102000 183000 74000 128000 36000 159000 56000 102000 Total Organic Carbon N -- ug/I 1000 U 10800 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U Total Suspended Solids N I ug/I 2500 U 2500 U 2500 U 10900 2500 U 7200 5000 U 8900 2700 Uranium, Natural T ug/I 0.95 2.1 3 0.5 U -- - -- -- 1.2 Vanadium D ug/I 1 2.2 1 0.3 1 0.95 1 0.23 J 1 0.071 J 0.19 J 1 2.2 1 0.11 J 0.13 J Page 13 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-4D 3/29/2016 N BL-GWA-4D GWA-5BR2 3/29/2016 N BL-GWA-5BR GWA-5D 3/29/2016 N BL-GWA-SD GWA-5S 3/29/2016 N BL-GWA-SS GWA-6D 3/30/2016 N BL-GWA-6D GWA-6S 3/30/2016 N BL-GWA-6S GWA-7D 3/30/2016 N BL-GWA-71) GWA-7S 3/30/2016 N BL-GWA-7S GWA-8D 3/30/2016 N BL-GWA-BD Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 3.6 0.38 0.93 0.55 0.27 J 0.6 2.9 0.88 0.3 J Zinc D -- ug/I 19 10 U 4.6 J 9.9 J 10 U 33 3.8 J 44 10 U Zinc T 1000 02L ug/I 26 J+ 3.4 J+ 4 J+ 16.2 J+ 3.2 J 26 4.6 J 37.1 6.2 J Dissolved Oxygen N I -- mg/I 5.3 0.3 0.2 6 2.3 3.2 3.6 1.9 0.8 Oxidation Reduction Potential N - mV 198 -102.2 111.4 249 -85.4 214.6 34.1 233.1 -106.5 pH N 6.5 - 8.5 02L SU 7.5 10.3 7.3 6 7.2 4.8 8.2 4.7 6.9 Specific Conductivity N PS/cm 246.9 197.4 264.1 84 246.5 88.5 294.5 139.2 156.1 Temperature N 1 1 Deg C 17.7 17.8 17.8 17.9 17.9 16.1 18.9 16.7 17 Turbidity, field N I I NTU 2.7 1.3 5.5 9.5 3.1 9.3 6.2 8.4 8.5 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 14 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-8S 3/30/2016 N BL-GWA-8S GWA-91D 3/30/2016 N BL-GWA-9D GWA-9S 3/30/2016 N BL-GWA-9S MW-103D 3/30/2016 N BL-MW-103D MW-103S 3/30/2016 N BL-MW-103S MW-104D 3/30/2016 N BL-MW-104D MW-201BR 4/27/2016 N BL-MW-201BR MW-202BR 3/29/2016 N BL-MW-202BR MW-202D 3/29/2016 N BL-MW-202D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N - ug/I 19700 36600 6000 2300 J 13600 64500 79200 32200 28100 Alkalinity, lab N ug/I 19700 36600 6000 2300 J 13600 64500 79200 32200 28100 Aluminum D ug/I 100 U 100 U 100 96 J 100 U 100 U 100 U 100 U 100 U Aluminum T ug/I 68.3 J 100 U 1150 93.2 J 100 U 570 57.4 J 100 U 100 U Antimony D ug/I 0.5 U 0.9 0.14 J 0.5 U 5 U 0.16 J 0.17 J 0.5 U 0.5 U Antimony T 1 IMAC ug/I 0.5 U 0.7 0.31 J 0.5 U 5 U 0.13 J 0.27 J 0.18 J 0.5 U Arsenic D -- ug/I 0.05 J 0.095 J 0.1 U 0.37 69 0.1 0.46 0.3 0.1 U Arsenic T 10 02L ug/I 0.06 J 0.1 1.5 1.4 70 0.19 0.48 0.28 0.056 J Barium D -- ug/I 55 4.7 J 49 320 45 12 5 U 5 U 4.2 J Barium T 700 02L ug/I 56.7 5.3 63.2 306 44.3 16.2 3.3 J 5 U 4.5 J Beryllium D -- ug/I 0.5 0.043 J 0.22 3.7 0.15 J 0.019 J 0.036 J+ 0.059 J 0.1 U Beryllium T 4 IMAC ug/I 0.4 0.1 U 0.55 3.4 1 U 0.084 J+ 0.34 J+ 0.1 U 0.049 J+ Boron D -- ug/I 92 50 U 50 U 360 630 50 U 50 U 50 U 50 U Boron T 700 02L ug/I 100 50 U 50 U 351 667 50 U 50 U 50 U 50 U Cadmium D -- ug/I 0.084 0.08 U 0.071 J 1.7 0.8 U 0.068 J 0.08 U 0.08 U 0.08 U Cadmium T 2 02L ug/I 0.071 J 0.088 0.071 J 1.7 0.8 U 0.08 U 0.08 U 0.08 U 0.08 U Calcium T -- ug/I 19700 11700 840 40100 17700 10600 24200 6360 4070 Chloride N 250000 02L ug/I 3100 14500 960J 226000 227000 1000 5700 3000 2700 Chromium D -- ug/I 0.65 0.26 J 0.31 J 0.34 J 3.4 J 1.1 2.1 0.42 J 0.32 J Chromium T 10 02L ug/I 1.5 0.71 J+ 12 0.53 J+ 10.6 4.1 3.9 J+ 1.3 0.43 J+ Chromium 6+ T 0.07 DHHS ug/I 0.098 0.082 0.085 0.03 U 0.03 U 0.82 J- 2.8 0.33 0.086 Cobalt D -- ug/I 0.23 1.2 0.59 9.8 57.5 0.046 J 0.16 0.1 U 0.1 U Cobalt T 1 IMAC ug/I 0.29 2.1 2.1 5.7 58.9 0.46 0.56 0.044 J+ 0.029 J+ Copper D -- ug/I 1.5 0.49 J+ 1.1 J+ 7.7 2.6 J 1.1 1.5 0.15 J 1 Copper T 1000 02L ug/I 0.12 J 0.6 2.8 0.44 J 5 U 2.2 52 1.2 0.14 J Iron D -- ug/I 50 U 50 U 84 50 U 83900 29 J 50 U 50 U 50 U Iron T 300 02L ug/I 58 29.9 J 1740 190 84000 756 142 53.6 25.4 J Lead D -- ug/I 0.1U 0.1U 0.1U 0.1U 1U 0.1U 0.1U 0.1U 0.1U Lead T 15 02L ug/I 0.1 U 0.1 U 1.1 0.1 U 1 U 0.44 0.42 0.11 0.1 U Magnesium T -- ug/I 3520 4580 510 37600 34700 5290 5900 2310 2040 Manganese D -- ug/I 48 7.6 22 1600 10400 3.2 J 24.4 5 U 5 U Manganese T 50 02L ug/I 46.9 9.6 37.1 1110 9330 27.7 28.9 4.3 J 5 U Mercury D -- ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.089 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane N -- ug/I 1.5 J+ 2.2 J+ 2.4 J+ 1.6 J+ 1440 1.8 J+ 10 U 1.6 J+ 1.7 J+ Molybdenum D -- ug/I 0.5 U 1.5 0.5 U 0.5 U 5 U 2 9.4 1 0.25 J Molybdenum T - ug/I 0.5 U 1 0.45 J 0.5 U 5 U 2.1 11.6 1.2 0.24 J Nickel D -- ug/I 0.68 1.4 0.9 22.4 5.8 0.5 U 0.5 J 0.5 U 0.53 Nickel T 100 02L ug/I 1 1.8 7.7 22.4 7.6 1.9 1 0.68 0.6 Nitrogen, NO2 plus NO3 N -- ug/I 20 U 920 74 88 J+ 20 U 150 J+ 20 U 120 170 Potassium T ug/I 5000 U 5000 U 5000 U 6960 3180 J 5000 U 9380 5000 U 5000 U Selenium D -- ug/I 4.4 0.5 U 0.5 U 1.8 5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium T 20 02L ug/I 5.8 0.5 U 0.75 2.1 5 U 0.58 0.5 U 0.5 U 0.5 U Sodium T -- ug/I 5230 8020 5000 U 28000 21400 8680 12300 8860 7890 Strontium D ug/I 210 52 4.2 J 420 79 84 51.5 33 35 Strontium T -- ug/I 202 51.2 4.5 J 388 76.3 74.2 68.9 37 35.3 Sulfate N 250000 02L ug/I 49100 5600 920 J 940 J 600 J 1900 18900 4900 1800 Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.1 U 0.1 U 0.03 J 1.5 0.17 J 0.025 J 0.1 U 0.1 U 0.1 U Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 0.15 1.5 1 U 0.1 U 0.1 U 0.1 U 0.1 U Total Dissolved Solids N 500000 02L ug/I 101000 54000 25000 U 412000 365000 77000 121000 67000 57000 Total Organic Carbon N -- ug/I 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U 980 J 10200 1000 U Total Suspended Solids I N I ug/I 2500 U 2500 U 10300 2500 U 64000 20200 5000 U 2500 U 2500 U Uranium, Natural T ug/I 0.26 J -- -- 0.5 U 5 U 0.36 J 2.2 0.095 J 0.5 U Vanadium D ug/I 1 0.3 U 0.28 J 0.09 J 0.3 U 3 U 3 1 0.25 J 0.47 1 0.26 J Page 15 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: GWA-8S 3/30/2016 N BL-GWA-8S GWA-9D 3/30/2016 N BL-GWA-9D GWA-9S 3/30/2016 N BL-GWA-9S MW-103D 3/30/2016 N BL-MW-103D MW-103S 3/30/2016 N BL-MW-103S MW-104D 3/30/2016 N BL-MW-104D MW-201BR 4/27/2016 N BL-MW-201BR MW-202BR 3/29/2016 N BL-MW-202BR MW-202D 3/29/2016 N BL-MW-202D Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 0.22 J 0.28 J 4.5 0.3 U 3 U 5.8 0.5 J+ 0.56 0.33 Zinc D -- ug/I 4.5 J 34 23 22 4.5 J 4.5 J 10 U 19 3.9 J Zinc T 1000 02L ug/I 10 U 26.1 J+ 31.1 J+ 13.3 10 U 5 J 19.6 52.1 2.9 J Dissolved Oxygen N I -- mg/I 4.6 -- -- 2.02 0.27 4.54 0.3 4.4 5.8 Oxidation Reduction Potential N - mV 251.6 - 210.8 -68 135.5 7.3 175.9 171.5 pH N 6.5 - 8.5 02L SU 5.4 5 6.4 6.8 8.6 6.4 5.7 Specific Conductivity N PS/cm 168.4 733 852 123.5 223 95.7 72.6 Temperature N Deg C 16.5 15.1 15.6 18 20.3 18.3 20.1 Turbidity, field I N NTU 3.9 4.09 0.01 41.22 9 6 2.1 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 16 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: MW-202S 3/29/2016 N BL-MW-202S MW-203BR 3/30/2016 N BL-MW-203BR MW-203BR 3/30/2016 FD BL-FD-MW-203BR MW-3 3/29/2016 N BL-MW-3 Constituent Fraction NCDEQ 02L GWQS,IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N ug/I 12600 60900 58500 4800 J Alkalinity, lab N ug/I 12600 60900 58500 4800 J Aluminum D ug/I 100 U 100 U 82 J 100 U Aluminum T ug/I 100 U 100 U 94.6 J 61.6 J Antimony D ug/I 0.5 U 0.5 U 0.5 U 0.5 U Antimony T 1 IMAC ug/I 0.5 U 0.5 U 0.5 U 0.5 U Arsenic D -- ug/I 0.1 U 0.1 0.087 J 0.1 U Arsenic T 10 02L ug/I 0.043 J 0.1 0.1 0.085 J Barium D -- ug/I 18 5 U 5 U 65 Barium T 700 02L ug/I 19.9 5 U 5 U 68.8 Beryllium D -- ug/I 0.14 0.1 U 0.036 J 0.33 Beryllium T 4 IMAC ug/I 0.23 J+ 0.1 U 0.1 U 0.32 J+ Boron D -- ug/I 50 U 50 U 50 U 50 U Boron T 700 02L ug/I 50 U 50 U 50 U 50 U Cadmium D -- ug/I 0.08 U 0.08 U 0.08 U 0.08 U Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.08 U 0.058 J Calcium T -- ug/I 1060 10300 9900 2850 Chloride N 250000 02L ug/I 1700 2400 2300 10700 Chromium D -- ug/I 0.6 0.7 0.64 0.55 Chromium T 10 02L ug/I 0.74 J+ 0.79 J+ 1.1 J+ 0.84 J+ Chromium 6+ T 0.07 DHHS ug/I 0.48 0.39 0.41 0.34 Cobalt D -- ug/I 0.028 J 0.1 U 0.026 J 0.1 U Cobalt T 1 IMAC ug/I 0.075 J+ 0.01 J 0.016 J 0.07 J+ Copper D -- ug/I 1.3 1.6 1.5 0.71 Copper T 1000 02L ug/I 0.17 J 0.5 U 5.3 0.32 J Iron D -- ug/I 50 U 50 U 50 U 50 U Iron T 300 02L ug/I 82.5 50 U 59.2 86.1 Lead D -- ug/I 0.1 U 0.1 U 0.1 U 0.1 U Lead T 15 02L ug/I 0.1 U 0.1 U 0.1 U 0.12 Magnesium T -- ug/I 519 5410 5330 1030 Manganese D -- ug/I 3.2 J+ 5 U 5 U 3.6 J+ Manganese T 50 02L ug/I 3.9 J 5 U 5 U 4.8 J Mercury D -- ug/I 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U Methane N -- ug/I 1.8 J+ 1.9 J+ 1.6 J+ 1.6 J+ Molybdenum D ug/I 0.5 U 2.6 2.4 0.5 U Molybdenum T ug/I 0.5 U 2.4 2.7 0.5 U Nickel D -- ug/I 0.5 U 0.5 U 0.5 U 0.68 Nickel T 100 02L ug/I 0.5 U 0.5 U 0.5 U 0.65 Nitrogen, NO2 plus NO3 N -- ug/I 39 430 440 20 U Potassium T ug/I 5000 U 5000 U 5000 U 2880 J Selenium D -- ug/I 0.5 U 0.5 U 0.5 U 0.5 U Selenium T 20 02L ug/I 0.5 U 0.5 U 0.32 J 0.5 U Sodium T -- ug/I 5220 8200 8180 3090 J Strontium D ug/I 8.3 35 36 26 Strontium T -- ug/I 8.7 34.5 33.3 27 Sulfate N 250000 02L ug/I 570 J 2700 2600 1000 U Sulfide N -- ug/I 100 UJ 100 U 100 U 100 U Thallium D -- ug/I 0.1 U 0.1 U 0.1 U 0.1 U Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 0.1 U 0.024 J Total Dissolved Solids N 500000 02L ug/I 33000 82000 82000 39000 Total Organic Carbon N -- ug/I 1000 U 1000 U 1000 U 1000 U Total Suspended Solids N ug/I 3100 5000 U 5400 5800 Uranium, Natural I T I ug/I 0.5 U -- -- 0.5 U Vanadium I D I I I ug/I 0.12 J 2.5 2.2 0.18 J Page 17 of 18 Belews Creek Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Location: Date: Sample Type: Sample Name: MW-202S 3/29/2016 N BL-MW-202S MW-203BR 3/30/2016 N BL-MW-203BR MW-203BR 3/30/2016 FD BL-FD-MW-203BR MW-3 3/29/2016 N BL-MW-3 Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Vanadium T 0.3 IMAC ug/I 0.19 J 2.3 2.5 0.38 Zinc D -- ug/I 4 J 6.7 J 2.9 J 7.3 J Zinc T 1000 02L ug/I 10 U 3.1 J+ 4.9 J+ 4.7 J+ Dissolved Oxygen N I -- mg/I 7.2 -- -- 7.6 Oxidation Reduction Potential N - mV 149.7 308 pH N 6.5 - 8.5 02L SU 5.3 4.8 Specific Conductivity N PS/cm 36.1 56.1 Temperature N 1 1 Deg C 19 15.1 Turbidity, field N I I NTU 2.7 8.1 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 18 of 18 CSA Supplement 2 Table 3-2: Round 5 Analytical Results of Porewater Monitoring Location: Date: Sample Type: Sample Name: AB-4S 4/1/2016 N BL-AB-4S AB-4SL 4/1/2016 FD BL-AB-4SL-FD AB-4SL 4/1/2016 N BL-AB-4SL AB-5S 3/31/2016 N BL-AB-SS AB-5SL 3/31/2016 N BL-AB-5SL AB-6S 3/31/2016 N BL-AB-6S AB-6SL 3/31/2016 N BL-AB-6SL AB-7S 4/1/2016 N BL-AB-7S AB-8S 3/31/2016 N BL-AB-8S AB-8SL 3/31/2016 N BL-AB-8SL Constituent Fraction NCDEQ 02L GWQS,IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 139000 135000 5000 U 58000 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N ug/I 70300 5000 U 5000 U 76000 5000 U 39400 93200 5000 U 6700 217000 Alkalinity, lab N ug/I 70300 152000 154000 76000 79700 39400 93200 5000 U 6700 217000 Aluminum D ug/I 76.5 J 8800 8640 120 960 J 100 U 100 U 8080 100 U 100 U Aluminum T ug/I 74.6 J 9560 9860 116 1010 100 U 100 U 8560 100 U 57.7 J Antimony D -- ug/1 5 U 9.2 9.3 0.5 U 11.4 0.46 J 0.5 U 5 U 0.42 J 0.16 J Antimony T 1 IMAC ug/1 5 U 9.8 9.8 0.5 U 10.1 0.46 J 0.5 U 5 U 0.46 J 0.24 J Arsenic D -- ug/I 77.3 60 62.6 77.9 46.5 3.1 6.4 50.6 2.5 139 Arsenic T 10 02L ug/I 78.9 65.4 66.6 95.2 47.2 17.2 8.5 49.6 3 147 Barium D -- ug/I 124 156 153 85 260 J 120 130 13 J 55 190 Barium T 700 02L ug/I 134 170 176 78.8 260 115 148 15 J 48.2 183 Beryllium D -- ug/I 0.13 J 0.12 J 1 U 0.1 U 2 U 0.02 J 0.011 J 6.6 0.11 0.11 Beryllium T 4 IMAC ug/1 0.24 J 1 U 1 U 0.03 J 2 U 0.043 J 0.052 J 4.1 0.07 J 0.1 U Boron D -- ug/I 17100 12000 12600 2800 14700 84 680 254 80 1400 Boron T 700 02L ug/I 21100 15400 10800 2300 16900 76.1 746 294 74.5 1050 Cadmium D -- ug/1 0.8 U 0.8 U 0.8 U 0.08 U 1.6 U 0.08 U 0.08 U 1.4 0.18 0.08 U Cadmium T 2 02L ug/I 0.8 U 0.8 U 0.8 U 0.08 U 1.6 U 0.08 U 0.08 U 1.3 0.18 0.08 U Calcium T -- ug/I 305000 141000 139000 45600 381000 12500 28600 75200 14900 39300 Chloride N 250000 02L ug/I 614000 8400 8500 38200 534000 7400 7400 30600 1500 7200 Chromium D -- ug/I 5 U 5 U 5 U 0.13 J IOU 0.49 J 0.25 J 4.2 J 2 1.9 Chromium T 10 02L ug/1 5 U 5 U 1.1 J+ 0.13 J+ IOU 1.8 0.31 J+ 2.8 J 2.3 J+ 1.5 Chromium 6+ T 0.07 DHHS ug/I 0.03 U 1.6 J 1.4 J 0.03 U 0.03 U 0.13 0.03 U 0.03 U 0.2 0.03 U Cobalt D -- ug/1 1 U 1 U 1 U 0.1 U 2 U 0.16 0.1 U 302 3.1 6.4 Cobalt T 1 IMAC ug/I 0.1 J 0.16 J 0.18 J 0.034 J 2 U 0.44 0.1 U 271 3.2 7 Copper D -- ug/1 5 U 5 U 3.3 J 0.5 U 10 U 1.4 0.5 U 13.4 0.73 0.5 U Copper T 1000 02L ug/I 5 U 5 U 5 U 0.38 J IOU 1.2 0.5 U 6.2 1.5 0.5 U Iron D -- ug/I 2760 50 U 50 U 68 50 UJ 50 U 4200 111000 560 98000 Iron T 300 02L ug/I 3060 66.6 102 483 50 U 1590 5440 132000 550 100000 Lead D -- ug/I 1U 1U 1U 0.1U 2U 0.1U 0.1U 1U 0.1U 0.1U Lead T 15 02L ug/I 1U 1U 1U 0.1U 2U 0.1U 0.1U 1U 0.1U 0.1U Magnesium T -- ug/I 98300 267 268 10900 7850 4510 4310 25800 1320 11500 Manganese D -- ug/I 408 5 U 5 U 120 5 UJ 5 U 110 9170 25 1500 Manganese T 50 02L ug/I 421 5 U 5 U 111 5 U 3.3 J 111 10400 23.1 1450 Mercury D -- ug/1 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane N -- ug/I 188 5.9 J+ 16100 3.5 J+ 4420 1.6 J+ 5050 J 410 2.8 J+ 7520 Molybdenum D ug/I 20.7 3130 3220 30.8 331 4 1.7 5 U 3.6 69.3 Molybdenum T ug/I 19.3 3210 3230 29.1 327 4 1.5 5 U 4.1 58.7 Nickel D -- ug/I 5 U 5 U 5 U 0.5 U 10 U 1.4 0.5 U 190 6.2 1.2 Nickel T 100 02L ug/1 5 U 5 U 5 U 0.5 U 10 U 1.4 0.5 U 174 6.6 0.97 Nitrogen, NO2 plus NO3 N -- ug/I 20 U 20 U 20 U 20 U 20 U 81 20 U 20 U 42 20 U Potassium T ug/I 8950 14700 14700 4640 J 21600 4080 J 4380 J 25000 U 5000 U 7510 Selenium D -- ug/I 5 U 32.4 32 0.63 10 U 1.5 0.5 U 213 17.3 1 Selenium T 20 02L ug/1 5 U 36.4 41.4 0.78 10 U 1.5 0.5 U 205 19.6 0.78 Sodium T -- ug/I 15600 5000 U 5000 U 7140 13400 7070 5660 29800 5000 U 7560 Strontium D ug/I 1390 2210 2180 320 4200 88 630 488 89 360 Strontium T -- ug/I 1530 2410 2450 290 4370 85.1 703 580 75.9 325 Sulfate N 250000 02L ug/I 190000 219000 560 J 50200 228000 13300 4700 637000 38700 8500 Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 1 U 1 U 1 U 0.1 U 2 U 0.15 0.1 U 2.2 0.93 0.1 U Thallium T 0.2 IMAC ug/1 1 U 1 U 1 U 0.1 U 2 U 0.11 0.1 U 1.9 1 0.1 U Total Dissolved Solids N 500000 02L ug/I 1170000 528000 558000 157000 1000000 60000 97000 1030000 52000 260000 Total Organic Carbon N -- ug/I 520 J 2300 2400 1000 U 1000 U 1300 1800 1000 U 3700 15900 Total Suspended Solids N ug/I 5000 U 13800 15200 2500 U 2500 U 2500 U 3900 2500 U 2500 U 107000 Uranium, Natural T ug/1 5 U 5 U 5 U -- -- 0.065 J 0.5 U -- 0.5 U 0.22 J Vanadium D -- ug/I 3 U 867 893 0.12 J 77.6 5.9 0.18 J 1 J 0.42 14.6 Vanadium T 0.3 IMAC ug/I 3 U 913 930 0.27 J 87.1 18.9 0.31 11 0.58 17.2 Zinc D -- ug/I 2.6 J+ 10 U 10 U 10 U 10 UJ 10 U 10 U 390 11 10 U Zinc T 1000 02L ug/I 10 U 10 U 10 U 10 U 10 U 10.2 10 U 470 13.4 10 U Dissolved Oxygen N -- mg/I 0.2 0.2 0.2 0.2 0.2 0.95 0.2 0.6 1.1 0.1 Oxidation Reduction Potential N mV -103.8 -91.2 -91.2 -175.9 -55.6 113.2 -126 235 154.7 -94.1 pH N 6.5 - 8.5 02L SU 7.2 10.6 10.6 8.4 9.9 6.8 7 4.2 5.9 6.3 Belews Creek Steam Station Page 1 of 2 CSA Supplement 2 Table 3-2: Round 5 Analytical Results of Porewater Monitoring Location: AB-4S AB-4SL AB-4SL AB-5S AB-5SL AB-6S AB-6SL AB-7S AB-8S AB-8SL Date: 4/1/2016 4/1/2016 4/1/2016 3/31/2016 3/31/2016 3/31/2016 3/31/2016 4/1/2016 3/31/2016 3/31/2016 Sample Type: N FD N N N N N N N N Sample Name: BL-AB-4S BL-AB-4SL-FD BL-AB-4SL BL-AB-SS BL-AB-5SL BL-AB-6S BL-AB-6SL BL-AB-7S BL-AB-8S BL-AB-8SL NCDEQ 02L GWQS,IMAC, Constituent Fraction GWQS Source Unit or DHHS Specific Conductivity N PS/cm 2336 661 661 376.5 2185 145.2 238.7 1215 118.4 696 Temperature N Deg C 21.6 19.1 19.1 21.4 22 20.1 19.1 16.3 14.2 19 Turbidity, field N NTU 2.2 9.4 9.4 7 0.7 4.68 8.9 1.8 4.7 9.6 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal INS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 2 of 2 CSA Supplement 2 Table 3-3: Round 5 Analytical Results of Surface Water Monitoring Location: Date: Sample Type: Sample Name: SW-AB2 3/31 /2016 N BL-SW-AB2 SW-AB3 3/31 /2016 N BL-SW-AB3 SW-AB4 3/31 /2016 N BL-SW-AB4 SW-AB5 3/31 /2016 N BL-SW-AB5 SW-AB6 3/31 /2016 N BL-SW-AB6 SW-AB7 3/31 /2016 N BL-SW-AB7 SW-AB8 3/31 /2016 N BL-SW-AB8 SW-AB9 3/31 /2016 N BL-SW-AB9 SW-10 3/31 /2016 N BL-SW-10 Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS NCDEQ 02B SWQS (Class B - Water Supply) Units Alkalinity, CO3 N ug/L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N ug/L 24800 24400 48500 41300 25000 1700 J 3500 J 33600 4500 J Alkalinity, lab N ug/L 24800 24400 48500 41300 25000 1700 J 3500 J 33600 4500 J Aluminum D -- ug/L 73 J 100 U 100 U 100 U 100 U 250 700 100 U 100 U Aluminum T 87 ug/L 440 74 J 100 U 62.8 J 100 U 310 870 100 Ll 170 Antimony D -- -- ug/L 5 U 5 U 0.25 J 0.15 J 0.5 U 0.5 U 0.5 U 0.14 J 5 U Antimony T 1 5.6 ug/L 5 U 5 U 0.23 J 0.16 J 0.5 U 0.5 U 0.5 U 0.14 J 5 U Arsenic D - 150 ug/L 1.3 1.3 1.8 2.9 1.4 0.69 1.6 1.4 1.2 Arsenic T 10 10 ug/L 3.2 2 2.4 3.4 1.7 0.96 2.6 1.9 1.8 Barium D -- -- ug/L 88 93 67 59.6 48 52 45 92 240 Barium T 700 1000 ug/L 90 90 62 57.2 45 52 44 88 240 Beryllium D -- 6.5 ug/L 0.19 J 0.11 J 0.1 U 0.015 J+ 0.027 J 0.24 0.34 0.1 U 0.58 J Beryllium T 4 -- ug/L 1 U 1 U 0.1 U 0.042 J+ 0.017 J 0.23 0.42 0.1 U 1.2 Boron D -- ug/L 9200 9900 2400 2620 360 50 55 81 9600 Boron T 700 -- ug/L 9300 9600 2100 2510 310 52 55 77 9000 Cadmium D -- 0.15 ug/L 0.8 U 0.8 U 0.08 U 0.08 U 0.08 U 0.053 J 0.23 0.08 U 1.1 Cadmium T 2 -- ug/L 0.8 U 0.8 U 0.08 U 0.079 J 0.08 U 0.13 0.2 0.08 U 1.3 Calcium T -- -- ug/L 205000 208000 34600 33700 10200 5060 5970 9710 163000 Chloride N 250000 230000 ug/L 441000 450000 38200 19600 4800 12500 14700 8600 411000 Chromium D -- 11 ug/L 5 U 5 U 0.39 J 0.31 J+ 1.3 3.6 5 0.13 J 5 U Chromium T 10 -- ug/L 1.2 J+ 5 U 0.41 J+ 0.6 J+ 1.3 J+ 3.8 11.7 0.25 J+ 5 U Chromium 6+ T 0.07 ug/L 0.16 0.11 0.08 0.051 0.023 J 0.026 J 0.03 U 0.03 U 0.03 U Cobalt D -- -- ug/L 2.5 3.2 0.078 J 0.036 J 0.073 J 1.9 25 0.089 J 55.8 Cobalt T 1 3 ug/L 3.9 3.6 0.092 J 0.091 J 0.06 J 2 24.3 0.14 67.3 Copper D -- 2.7 ug/L 2 J 1.8 J 1.2 2.2 0.84 1.3 2 0.82 1.5 J Copper T 1000 -- ug/L 2.8 J 2.1 J 0.95 1.4 0.45 J 0.57 1.4 0.3 J 1.2 J Iron D -- ug/L 50 U 50 U 66 50 U 130 150 1100 150 380 Iron T 300 -- ug/L 580 330 220 124 300 720 2500 420 550 Lead D -- 0.54 ug/L 1U 1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 1U Lead T 15 -- ug/L 1.1 1 U 0.1 U 0.1 0.11 0.1 U 0.4 0.1 U 1 U Magnesium T -- ug/L 55200 54300 11700 12000 3580 2270 2530 3410 49500 Manganese D -- ug/L 380 450 13 29 17 160 1000 37 7000 Manganese T 50 -- ug/L 460 490 44 90.9 30 180 1000 55 7300 Mercury T 1 0.012 ug/L 0.00432 0.00319 0.00272 J+ 0.00182 0.00138 J+ 0.00194 J+ 0.000869 J+ 0.00163 J+ 0.113 Methane N -- -- ug/L 2.8 J+ 9 J+ 24.4 4 J+ 11.8 J+ 14.1 J+ 21.9 25.9 2.8 J+ Molybdenum D - -- ug/L 40.7 42.2 4.5 7 0.43 J 0.14 J 0.79 1.7 5 U Molybdenum T - 160 ug/L 40.5 40.6 4.2 6.8 0.4 J 0.18 J 2.9 1.7 5 U Nickel D - 16 ug/L 8.9 9.8 1.3 0.55 2.5 35.4 112 0.45 J 10.7 Nickel T 100 25 ug/L 10.6 10 0.49 J 1.5 1.3 36.1 109 0.5 U 12.8 Nitrogen, NO2 plus NO3 N -- -- ug/L 91 80 110 33 J+ 150 55 50 25 110 Potassium T ug/L 8280 7940 3990 J 4620 J 5000 U 5000 U 5000 U 3530 J 4830 J Selenium D -- -- ug/L 10.4 9.1 1.8 5.2 0.94 0.6 0.69 0.36 J 12.3 Selenium T 20 5 ug/L 9.9 10.2 2 4.4 0.85 0.42 J 1.6 0.5 U 12.7 Sodium T -- -- ug/L 13600 13000 7920 10400 7050 8600 9440 6440 12900 Strontium D - -- ug/L 750 830 280 270 82 55 62 92 650 Strontium T -- 14000 ug/L 730 760 240 257 71 52 55 84 610 Sulfate N 250000 250000 ug/L 149000 140000 50700 87800 22400 22700 32400 8900 88600J- Sulfide N - -- ug/L 100 U 100 U 100 UJ 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- -- ug/L 0.86 J 0.81 J 0.078 J 0.032 J 0.1 U 0.24 0.75 0.1 U 1 U Thallium T 0.2 0.24 ug/L 0.911 0.82 J 0.078 J 0.034 J 0.1 U 0.24 0.76 0.1 U 1 U Total Dissolved Solids N 500000 500000 ug/L 834000 832000 164000 195000 25000 U 66000 74000 36000 846000 Total Organic Carbon N -- -- ug/L 6500 5600 4700 3800 3700 4800 2100 2100 790 J Total Suspended Solids I N I ug/L 21200 8600 2500 U 3000 2500 U 4600 4300 3100 5400 Vanadium D I -- -- ug/L 3 U 3 U 0.16 J 0.32 J+ 0.14 J 0.3 U 0.3 U 0.27 J 3 U Vanadium T 1 0.3 ug/L 2.8 J 1.5 J 0.42 0.58 0.26 J 0.085 J 0.92 0.6 3 U Page 1 of 2 Belews Creek Steam Station CSA Supplement 2 Table 3-3: Round 5 Analytical Results of Surface Water Monitoring Location: Date: Sample Type: Sample Name: SW-AB2 3/31 /2016 N BL-SW-AB2 SW-AB3 3/31 /2016 N BL-SW-AB3 SW-AB4 3/31 /2016 N BL-SW-AB4 SW-AB5 3/31 /2016 N BL-SW-AB5 SW-AB6 3/31 /2016 N BL-SW-AB6 SW-AB7 3/31 /2016 N BL-SW-AB7 SW-AB8 3/31 /2016 N BL-SW-AB8 SW-AB9 3/31 /2016 N BL-SW-AB9 SW-10 3/31 /2016 N BL-SW-10 Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS NCDEQ 02B SWQS (Class B - Water Supply) Units Zinc D -- 36 ug/L 59 5.4 J 10 U 4.8 J 4.6 J 31 75 10 U 11 Zinc T 1000 -- ug/L 13 13 10 U 4 J 10 U 74 84 10 U 12 Dissolved Oxygen N I -- mg/I 7.22 7.2 7.18 7.9 5.33 7.24 4.83 5.95 6.58 Oxidation Reduction Potential N - my 174.8 135.4 123.7 245.6 99.7 75.3 70.3 113.5 120.9 pH N 6.5 - 8.5 6.0 - 9.0 SU 7.1 7.5 7.7 8 7.8 6.4 6.4 6.8 6.3 Specific Conductivity N - PS/cm 1 2080 1665 417.9 335.1 210.2 122.2 161.9 130.1 152.6 Temperature N - C 17.3 17.5 18 18.4 18.2 18.3 19.4 19.6 17.4 Turbidity, field N - NTU 23.15 5.12 2.13 8.9 2.92 4.35 5.7 1.66 2.19 55 Exceeds GWQS, IMAC, or DHHS criteria. 55 1 Exceeds SWQS criteria. Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 2 of 2 CSA Supplement 2 Table 3-4: Round 5 Analytical Results of Surface Water Monitoring Location: Date: Sample Type: Sample Name: SW-BL-D 3/31/2016 N BL-SW-BL-D SW-BL-U 3/31/2016 N BL-SW-BL-U SW-DR-D 3/31/2016 N BL-SW-DR-D SW-DR-U 3/31/2016 N BL-SW-DR-U SW-DR-U 3/31/2016 FD BL-FD-SW-DR-U Constituent Fraction NCDEQ 02B SWQS (Class B - Water Supply) Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N ug/I 1 29100 17900 20500 24200 24600 Alkalinity, lab N ug/I 29100 17900 20500 24200 24600 Aluminum D -- ug/I 100 U 100 U 100 U 62 J 74 J Aluminum T 87 ug/I 92 J 110 170 110 87 J Antimony D -- ug/I 0.5 U 0.5 U 0.5 U 5 U 5 U Antimony T 5.6 ug/I 0.5 U 0.5 U 0.5 U 5 U 5 U Arsenic D 150 ug/I 0.39 0.16 0.097 J 1.4 1.2 Arsenic T 10 ug/I 0.42 0.19 0.12 2.1 2 Barium D -- ug/I 17 25 19 86 86 Barium T 1000 ug/I 16 27 20 83 86 Beryllium D 6.5 ug/I 0.1 U 0.026 J 0.015 J 0.2 J 1 U Beryllium T -- ug/I 0.021 J 0.022 J 0.028 J 0.28 J 1 U Boron D ug/I 58 31 J 50 U 9600 9900 Boron T -- ug/I 50 31 J 50 U 8800 8900 Cadmium D 0.15 ug/I 0.08 U 0.08 U 0.08 U 0.8 U 0.8 U Cadmium T -- ug/I 0.08 U 0.08 U 0.08 U 0.8 U 0.8 U Calcium T -- ug/I 7870 3380 5350 204000 200000 Chloride N 230000 ug/I 7400 5300 3700 412000 411000 Chromium D 11 ug/I 0.18 J 0.26 J 0.2 J 5 U 5 U Chromium T ug/I 0.27 J 0.43 J 0.52 5 U 5 U Chromium 6+ T ug/I 0.027 J+ 0.049 0.041 0.13 J 0.27 J Cobalt D -- ug/I 0.05 J 0.098 J 0.068 J 2.8 2.9 Cobalt T 3 ug/I 0.057 J 0.15 0.19 3.6 3.3 Copper D 2.7 ug/I 1.2 0.91 0.72 1.7 J 1.4 J Copper T -- ug/I 1.1 0.3 J 0.57 2.5 J 2.2 J Iron D - ug/I 68 79 140 50 U 50 U Iron T -- ug/I 140 350 420 200 180 Lead D 0.54 ug/I 0.1 U 0.1 U 0.1 U 1 U 1 U Lead T -- ug/I 0.17 0.18 0.19 1 U 1 U Magnesium T -- ug/I 3530 1820 2130 55700 54400 Manganese D -- ug/I 7.9 20 9.2 380 390 Manganese T -- ug/I 8.6 29 26 440 440 Mercury T 0.012 ug/I 0.000799 J+ 0.000916 J+ 0.000301 J+ 0.00237 J+ 0.00231 J+ Methane N -- ug/I 13.4 J+ 16.4 5.4 J+ 1.5 J+ 1.7 J+ Molybdenum D -- ug/I 1.4 0.5 U 0.5 U 36.9 36.8 Molybdenum T 160 ug/I 1.4 0.5 U 0.5 U 38.4 36.6 Nickel D 16 ug/I 0.5 U 0.5 U 0.5 U 9.4 9.1 Nickel T 25 ug/I 0.5 U 0.5 U 0.5 U 10.6 10.2 Nitrogen, NO2 plus NO3 N -- ug/I 67 71 180 87 100 Potassium T ug/I 3670 J 5000 U 5000 U 8430 8260 Selenium D -- ug/I 0.5 U 0.65 0.5 U 7.4 6.8 Selenium T 5 ug/I 0.39 J 0.59 0.5 U 8.3 9.9 Sodium T -- ug/I 6890 6240 4440 J 13900 13700 Strontium D -- ug/I 57 27 36 720 710 Strontium T 14000 ug/I 52 28 35 700 720 Sulfate N 250000 ug/I 8800 2800 3600 138000 136000 Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.015 J 0.1 U 0.1 U 0.73 J 0.75 J Thallium T 0.24 ug/I 0.1 U 0.1 U 0.1 U 0.66 J 0.67 J Total Dissolved Solids N 500000 ug/I 67000 43000 40000 1010000 1000000 Total Organic Carbon N -- ug/I 2800 650 J 1100 5100 5000 Page 1 of 2 Belews Creek Steam Station CSA Supplement 2 Table 3-4: Round 5 Analytical Results of Surface Water Monitoring Location: Date: Sample Type: Sample Name: SW-BL-D 3/31 /2016 N BL-SW-BL-D SW-BL-U 3/31 /2016 N BL-SW-BL-U SW-DR-D 3/31 /2016 N BL-SW-DR-D SW-DR-U 3/31 /2016 N BL-SW-DR-U SW-DR-U 3/31 /2016 FD BL-FD-SW-DR-U Constituent Fraction NCDEQ 02B SWQS (Class B - Water Supply) Unit Total Suspended Solids N ug/I 2500 U 9600 20400 7800 7600 Vanadium D -- ug/I 0.24 J 0.28 J 0.24 J 1.1 J 1 J Vanadium T -- ug/I 0.56 0.6 0.74 2.3 J 2.1 J Zinc D 36 ug/I 4.3 J 10 U 10 U 6.7 J 6.7 J Zinc T -- ug/I 10 U 11 10 U 11 10 Dissolved Oxygen N -- mg/I 6 6.8 7.2 6.4 6.4 Oxidation Reduction Potential N -- mV 123.1 115.2 142.5 162.4 162.4 pH N 6.0 - 9.0 SU 7.4 6.7 7.5 6.9 6.9 Specific Conductivity N -- PS/cm 111.7 74.2 110.1 160.7 160.7 Temperature N -- Deg C 19.1 16.4 17.2 19 19 Turbidity, field N -- NTU 3.6 2.9 4.6 7.8 7.8 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 2 of 2 CSA Supplement 2 Table 3-5: Round 5 Analytical Results of Areas of Wetness Monitoring Location: Date: Sample Type: Sample Name: S-1 3/31 /2016 N BL-S-1 S-2 3/31 /2016 N BL-S-2 S-3 3/31 /2016 N BL-S-3 S-4 3/31 /2016 N BL-S-4 S-5 3/31 /2016 N BL-S-5 S-6 3/31 /2016 N BL-S-6 S-7 3/31 /2016 N BL-S-7 S-8 3/31 /2016 N BL-S-8 S-9 3/31 /2016 N BL-S-9 S-10 3/31 /2016 N BL-S-10 Constituent Fraction NCDEQ 02L GWQS,IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N ug/I 20200 3300 J 5300 3800 J 9100 49400 6000 21300 15900 4000 J Alkalinity, lab N ug/I 20200 3300 J 5300 3800 J 9100 49400 6000 21300 15900 4000 J Aluminum D ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 51 J Aluminum T ug/I 239 87 J 79.1 J 509 106 100 U 62 J 100 U 87 J 100 U Antimony D ug/I 0.5U 0.5U 0.5U 0.5U 0.5U 5U 0.5U 0.5U 0.5U 5U Antimony T 1 IMAC ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 5 U 0.5 U 0.5 U 0.5 U 5 U Arsenic D ug/I 0.15 0.31 0.27 0.16 0.25 0.49 J 1.7 0.048 J 0.11 1.3 Arsenic T 10 02L ug/I 0.24 0.48 0.39 1.9 0.42 0.49 J 3 0.06 J 0.16 1.6 Barium D ug/I 17.2 145 11.3 90.5 7.6 58 26 40 29 220 Barium T 700 02L ug/I 18 139 11.4 86.9 7.5 57 28 37 31 230 Beryllium D ug/I 0.1 U 0.58 0.015 J+ 1.4 0.034 J+ 0.1 J 0.012 J 0.27 0.26 1.2 Beryllium T 4 IMAC ug/I 0.062 J+ 0.8 0.069 J+ 2.6 0.041 J+ 1 U 0.12 0.28 0.29 0.85 J Boron D ug/I 50 U 118 50 U 50 U 50 U 2500 50 U 78 1000 9300 Boron T 700 02L ug/I 50 U 111 50 U 50 U 50 U 2400 50 U 67 1000 8700 Cadmium D ug/I 0.08 U 0.13 0.08 U 0.18 0.08 U 0.8 U 0.08 U 0.08 U 0.22 1.2 Cadmium T 2 02L ug/I 0.08 U 0.18 0.08 U 0.22 0.08 U 0.8 U 0.08 U 0.063 J 0.21 1.2 Calcium T ug/I 3640 7300 1110 12000 1700 55300 819 5960 40200 159000 Chloride N 250000 02L ug/I 2600 53400 4500 70200 2800 106000 3800 14700 8600 412000 Chromium D ug/I 0.53 J+ 0.18 J+ 0.38 J+ 0.15 J+ 0.42 J+ 5 U 0.16 J 0.3 J 0.6 5 U Chromium T 10 02L ug/I 1 J+ 0.65 J+ 0.25 J+ 0.96 J+ 0.34 J+ 5 U 0.23 J+ 0.21 J+ 0.26 J+ 5 U Chromium 6+ T 0.07 DHHS ug/I 0.14 0.03 U 0.018 J 0.03 U 0.034 0.14 0.03 U 0.069 J- 0.026 J 0.03 U Cobalt D ug/I 0.37 1.2 0.09 J 2.3 0.13 1 1.4 0.096 J 0.13 63 Cobalt T 1 IMAC ug/I 0.45 1.3 0.16 3.2 0.2 0.92 J 1.5 0.11 0.23 61.9 Copper D ug/I 0.79 J+ 1 J+ 1.2 J+ 1.8 J+ 0.55 J+ 5 U 0.4 J 0.91 1.1 1.9 J Copper T 1000 02L ug/I 0.57 0.38 J 0.33 J 1.1 0.4 J 5 U 0.36 J 0.14 J 0.43 J 5 U Iron D ug/I 195 58 42.2 J 41.7 J 53 200 1300 50 U 50 U 280 Iron T 300 02L ug/I 719 243 186 1730 218 230 3700 40J 86 350 Lead D ug/I 0.1U 0.1U 0.1U 0.1U 0.1U 1U 0.1U 0.1U 0.1U 1U Lead T 15 02L ug/I 0.34 0.22 0.12 1 0.17 1 U 0.098 J 0.1 U 0.1 U 1 U Magnesium T ug/I 2340 8260 1050 10200 1240 14800 972 3270 21900 50400 Manganese D ug/I 17.8 136 5.1 64.5 8.5 510 120 6.3 50 7200 Manganese T 50 02L ug/I 19.1 141 9.4 79.8 11.2 500 130 6.7 56 6800 Mercury T 1 02L ug/I 0.00137 0.00126 0.00117 0.00194 0.0013 J+ 0.00113 J+ 0.000767 J+ 0.000603 J+ 0.00408 J+ 0.0838 Methane N ug/I 16.4 J+ 12.6 J+ 1.9 J+ 3.9 J+ 5.3 J+ 16.7 J+ 48 2.2 J+ 10 U 2.2 J+ Molybdenum D ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.3 J 0.5 U 0.5 U 0.11 J 5 U Molybdenum T ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.1 J 0.5 U 0.5 U 0.5 U 5 U Nickel D ug/I 1 5.1 0.5 U 4.1 0.7 5 U 0.5 U 0.5 U 2.6 12.1 Nickel T 100 02L ug/I 0.44 J 5.1 0.5 U 3.5 0.5 U 5 U 0.5 U 0.5 U 2.6 12.6 Nitrogen, NO2 plus NO3 N ug/I 32 J+ 42 J+ 14 J+ 67 J+ 160 J+ 240 16 J 320 1200 100 Potassium T ug/I 5000 U 3090 J 5000 U 3330 J 5000 U 3920 J 5000 U 5000 U 3130 J 5150 Selenium D ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 5 U 0.5 U 4.5 2.8 15.3 Selenium T 20 02L ug/I 0.5 U 0.5 U 0.5 U 0.41 J 0.5 U 5 U 0.5 U 3.9 3.5 11.5 Sodium T ug/I 3430 J 8800 2550 J 11100 2570 J 12000 2930 J 11200 20600 14000 Strontium D ug/I 18.1 85.8 13.5 154 18.8 310 7.7 43 130 590 Strontium T ug/I 16 78.7 12.4 138 17.3 320 7.9 40 140 610 Sulfate N 250000 02L ug/I 1800 1000 1300 770 J 1500 29600 1500 8700 197000 84200 J- Sulfide N ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D ug/I 0.1 U 0.039 J 0.1 U 0.076 J 0.1 U 1 U 0.1 U 0.1 U 0.1 U 1 U Thallium T 0.2 IMAC ug/I 0.1 U 0.037 J 0.1 U 0.12 0.1 U 1 U 0.1 U 0.1 U 0.1 U 1 U Total Dissolved Solids N 500000 02L ug/I 38000 99000 25000 U 140000 25000 U 248000 25000 U 53000 257000 578000 Total Organic Carbon N ug/I 640 J 1000 U 510 J 1000 U 1000 U 920 J 550 J 1000 U 1600 1000 U Total Suspended Solids N ug/I 6400 9900 4200 32600 5000 U 2500 U 30000 2500 U 2500 U 2500 U Vanadium D ug/I 0.4 J+ 0.074 J+ 0.12 J+ 0.3 U 0.16 J+ 3 U 0.3 U 0.28 J 0.26 J 3 U Vanadium T 0.3 IMAC ug/I 1.5 0.31 0.18 J 1.2 0.34 3 U 0.17 J 0.27 J 0.41 3 U Zinc D ug/I 8.4 J 12.2 10 U 6 J 10 U 12 3 J 3.6 J 15 12 Zinc T 1000 02L ug/I 10 U 5.1 J 10 U 5.6 J 10 U 11 2.8 J 10 U 17 10 Dissolved Oxygen N mg/I 7.7 7.2 7.9 7.9 8.5 5.1 5.9 7.2 8.8 9.8 Oxidation Reduction Potential N mV 75.1 152.1 203.2 190.4 188.8 176.3 109.2 174.9 160.4 165.2 pH N 6.5 - 8.5 02L SU 7.3 6.3 7.2 6.2 6.8 6.4 6.2 6.1 6.7 6.3 Specific Conductivity N PS/cm 63.9 192 36.9 249.8 37.5 805 52.6 128.6 473.6 1473 Temperature N Deg C 14.4 17.8 16.5 16.7 16 14.1 18.6 17.8 14.6 16.2 Turbidity, field N NTU 5.6 16.3 3.4 45.8 2.7 1.7 1.4 1.5 2 1.3 Belews Creek Steam Station Page 1 of 2 CSA Supplement 2 Table 3-5: Round 5 Analytical Results of Areas of Wetness Monitoring Location: S-1 S-2 S-3 S 4 S-5 S-6 S-7 S-8 S-9 S-10 Date: 3/31/2016 3/31/2016 3/31/2016 3/31/2016 3/31/2016 3/31/2016 3/31/2016 3/31/2016 3/31/2016 3/31/2016 Sample Type: N N N N N N N N N N Sample Name: BL-S-1 BL-S-2 BL-S-3 BL-S-4 BL-S-5 BL-S-6 BL-S-7 BL-S-8 BL-S-9 BL-S-10 NCDEQ 02L GWQS, Constituent Fraction GWQS Source Unit IMAC, or DHHS Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Belews Creek Steam Station Page 2 of 2 CSA Supplement 2 Table 3-6: Groundwater Elevations Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation AB-1D 7/7/2015 772.47 36.00 736.47 9/28/2015 38.90 733.57 5/9/2016 38.70 733.77 AB-1S 7/7/2015 772.42 37.91 734.51 9/28/2015 48.83 723.59 5/9/2016 40.70 731.72 AB-2D 7/7/2015 773.84 39.80 734.04 9/28/2015 42.86 730.98 5/9/2016 42.65 731.19 AB-2S 7/7/2015 773.94 29.84 744.10 9/28/2015 33.25 740.69 5/9/2016 32.10 741.84 AB-3D 7/7/2015 772.51 46.81 725.70 9/28/2015 49.60 722.91 5/9/2016 48.60 723.91 AB-3S 7/7/2015 772.62 38.69 733.93 9/28/2015 38.44 734.18 5/9/2016 38.35 734.27 AB-4BR 7/7/2015 761.99 4.20 757.79 9/28/2015 6.80 755.19 5/9/2016 7.11 754.88 AB-4D 7/7/2015 762.21 4.32 757.89 9/28/2015 7.03 755.18 5/9/2016 7.38 754.83 AB-4S 7/7/2015 762.18 3.93 758.25 9/28/2015 6.88 755.30 5/9/2016 7.31 754.87 AB-4SL 7/7/2015 762.25 4.10 758.15 9/28/2015 7.06 755.19 5/9/2016 7.49 754.76 AB-5D 7/7/2015 762.13 3.44 758.69 9/28/2015 6.44 755.69 5/9/2016 6.79 755.34 AB-5S 7/7/2015 761.90 3.03 758.87 9/28/2015 6.12 755.78 5/9/2016 6.51 755.39 AB-5SL 7/7/2015 761.85 2.36 759.49 9/28/2015 5.88 755.97 5/9/2016 6.20 755.65 AB-6D 7/7/2015 765.33 3.68 761.65 9/28/2015 6.60 758.73 5/9/2016 6.91 758.42 AB-6S 7/7/2015 765.55 1.98 763.57 9/28/20151 5.43 760.12 5/9/2016 6.09 759.46 Page 1 of 7 Belews Creek Steam Station CSA Supplement 2 Table 3-6: Groundwater Elevations Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation AB-6SL 7/7/2015 765.50 2.00 763.50 9/28/2015 5.51 759.99 5/9/2016 6.12 759.38 AB-7D 7/7/2015 771.14 7.61 763.53 9/28/2015 11.51 759.63 5/9/2016 11.65 759.49 AB-7S 7/7/2015 771.09 8.96 762.13 9/28/2015 12.45 758.64 5/9/2016 12.25 758.84 AB-8D 7/7/2015 765.38 5.20 760.18 9/28/2015 8.15 757.23 5/9/2016 8.01 757.37 AB-8S 7/7/2015 765.10 4.98 760.12 9/28/2015 7.61 757.49 5/9/2016 7.54 757.56 AB-8SL 7/7/2015 765.29 5.03 760.26 9/28/2015 7.97 757.32 5/9/2016 8.14 757.15 AB-913R 7/7/2015 782.84 22.26 760.58 9/28/2015 24.99 757.85 5/9/2016 23.90 758.94 AB-9D 7/7/2015 782.84 21.57 761.27 9/28/2015 24.34 758.50 5/9/2016 23.31 759.53 AB-9S 7/7/2015 783.15 17.28 765.87 9/28/2015 20.47 762.68 5/9/2016 22.40 760.75 BC-23A 863.79 -- -- -- 5/9/2016 80.15 783.64 BC-28 818.09 -- -- -- 5/9/2016 50.70 767.39 BG-1D 7/7/2015 808.48 48.09 760.39 9/28/2015 51.01 757.47 5/9/2016 44.73 763.75 BG-1S 7/7/2015 808.75 DRY -- 9/28/2015 44.68 764.07 5/9/2016 44.72 764.03 BG-2BR 7/7/2015 812.59 45.55 767.04 9/28/2015 48.75 763.84 BG-2D 7/7/2015 812.13 46.03 766.10 9/28/2015 48.93 763.20 5/9/2016 45.901 766.23 Page 2 of 7 Belews Creek Steam Station CSA Supplement 2 Table 3-6: Groundwater Elevations Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation BG-2S 7/7/2015 811.80 47.63 764.17 9/28/2015 50.32 761.48 5/9/2016 47.65 764.15 BG-3D 7/7/2015 844.61 28.74 815.87 9/28/2015 32.41 812.20 5/9/2016 28.29 816.32 BG-3S 7/7/2015 845.64 30.66 814.98 9/28/2015 34.92 810.72 5/9/2016 30.60 815.04 CRW-10 777.23 -- -- -- 5/9/2016 22.90 754.33 GWA-10D 7/7/2015 749.54 7.84 741.70 9/28/2015 10.96 738.58 5/9/2016 6.38 743.16 GWA-10S 7/7/2015 749.11 6.54 742.57 9/28/2015 9.00 740.11 5/9/2016 4.98 744.13 GWA-11D 7/7/2015 757.04 31.46 725.58 9/28/2015 35.25 721.79 5/9/2016 29.55 727.49 GWA-11S 7/7/2015 757.03 28.77 728.26 9/28/2015 32.01 725.02 5/9/2016 24.92 732.11 GWA-12BR 7/7/2015 836.46 62.00 774.46 9/28/2015 65.57 770.89 5/9/2016 63.37 773.09 GWA-12D 7/7/2015 837.16 53.69 783.47 9/28/2015 57.10 780.06 5/9/2016 56.30 780.86 GWA-12S 7/7/2015 835.79 51.43 784.36 9/28/2015 55.98 779.81 5/9/2016 55.05 780.74 GWA-16BR 783.66 9/28/2015 39.04 744.62 5/9/2016 56.23 727.43 GWA-16D 7/7/2015 784.53 34.29 750.24 9/28/2015 39.06 745.47 5/9/2016 36.77 747.76 GWA-16S 7/7/2015 784.41 33.44 750.97 9/28/2015 36.36 748.05 5/9/2016 34.13 750.28 GWA-17D 7/7/2015 787.37 37.21 750.16 9/28/2015 40.09 747.28 5/9/2016 36.701 750.67 Page 3 of 7 Belews Creek Steam Station CSA Supplement 2 Table 3-6: Groundwater Elevations Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation GWA-17S 7/7/2015 787.61 36.88 750.73 9/28/2015 39.52 748.09 5/9/2016 36.90 750.71 GWA-18 D 774.54 -- -- -- 5/9/2016 25.57 748.97 GWA-19S 743.33 -- -- -- 5/9/2016 8.80 734.53 GWA-1D 7/7/2015 743.03 26.46 716.57 9/28/2015 29.12 713.91 5/9/2016 20.00 723.03 GWA-1S 7/7/2015 743.08 24.96 718.12 9/28/2015 27.73 715.35 5/9/2016 19.71 723.37 GWA-20D 773.72 -- -- -- 5/9/2016 26.60 747.12 GWA-20S 773.84 -- -- -- 5/9/2016 -- -- G WA-21 D 734.79 -- -- -- 5/9/2016 14.80 719.99 GWA-21S 735.01 -- -- -- 5/9/2016 14.15 720.86 GWA-23 D 811.79 -- -- -- 5/9/2016 25.15 786.64 GWA-23S 811.57 -- -- -- 5/9/2016 25.00 786.57 GWA-24D 642.21 -- -- -- 5/9/2016 15.72 626.49 GWA-2D 7/7/2015 787.51 39.36 748.15 9/28/2015 42.27 745.24 5/9/2016 40.68 746.83 GWA-2S 7/7/2015 787.58 38.80 748.78 9/28/2015 41.82 745.76 5/9/2016 40.05 747.53 GWA-3D 7/7/2015 769.50 40.66 728.84 9/28/2015 43.74 725.76 5/9/2016 41.80 727.70 Page 4 of 7 Belews Creek Steam Station CSA Supplement 2 Table 3-6: Groundwater Elevations Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation GWA-3S 7/7/2015 769.14 40.43 728.71 9/28/2015 43.43 725.71 5/9/2016 41.50 727.64 GWA-4D 7/7/2015 802.88 47.00 755.88 9/28/2015 54.00 748.88 5/9/2016 49.03 753.85 GWA-5BR-2 7/7/2015 792.11 31.04 761.07 9/28/2015 34.40 757.71 5/9/2016 33.34 758.77 GWA-5D 7/7/2015 791.29 28.09 763.20 9/28/2015 31.92 759.37 5/9/2016 30.61 760.68 GWA-5S 7/7/2015 792.04 28.36 763.68 9/28/2015 31.89 760.15 5/9/2016 30.62 761.42 GWA-6D 7/7/2015 793.25 37.44 755.81 9/28/2015 39.86 753.39 5/9/2016 37.69 755.56 GWA-6S 7/7/2015 793.37 30.25 763.12 9/28/2015 33.13 760.24 5/9/2016 30.85 762.52 GWA-7D 7/7/2015 822.70 34.66 788.04 9/28/2015 37.80 784.90 5/9/2016 34.73 787.97 GWA-7S 7/7/2015 822.87 33.58 789.29 9/28/2015 37.12 785.75 5/9/2016 33.72 789.15 GWA-8D 7/7/2015 831.15 26.66 804.49 9/28/2015 31.56 799.59 5/9/2016 29.06 802.09 GWA-8S 7/7/2015 832.01 25.13 806.88 9/28/2015 29.35 802.66 5/9/2016 26.15 805.86 GWA-9D 7/7/2015 794.28 41.43 752.85 9/28/2015 44.71 749.57 5/9/2016 43.31 750.97 GWA-9S 7/7/2015 793.99 39.89 754.10 9/28/2015 42.92 751.07 5/9/2016 41.30 752.69 MW-102D 7/7/2015 653.07 Top of 2" PVC Riser -- -- -- -- 5/9/2016 -- -- M W-102S 7/7/2015 653.07 7.56 645.51 -- -- -- 5/9/2016 -- -- Page 5 of 7 Belews Creek Steam Station CSA Supplement 2 Table 3-6: Groundwater Elevations Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation MW-103D 7/7/2015 684.25 5.11 679.14 9/28/2015 8.16 676.09 5/9/2016 -- -- MW-103S 7/7/2015 684.00 4.01 679.99 9/28/2015 7.11 676.89 5/9/2016 -- -- MW-104D 7/7/2015 798.34 39.08 759.26 9/28/2015 42.16 756.18 5/9/2016 39.68 758.66 MW-104S 7/7/2015 798.68 39.48 759.20 9/28/2015 42.58 756.10 5/9/2016 -- -- MW-200BR 7/7/2015 636.42 Flowing Artesian Flowing Artesian 9/28/2015 Flowing Artesian Flowing Artesian 5/9/2016 Flowing Artesian Flowing Artesian MW-200D 7/7/2015 636.05 3.96 632.09 9/28/2015 6.27 629.78 MW-200S 7/7/2015 635.89 4.16 631.73 9/28/2015 5.03 630.86 MW-201BR 7/7/2015 783.77 33.13 750.64 9/28/2015 35.64 748.13 5/9/2016 33.62 750.15 MW-202BR 7/7/2015 789.63 45.32 744.31 9/28/2015 49.07 740.56 5/9/2016 43.50 746.13 MW-202D 7/7/2015 790.78 46.39 744.39 9/28/2015 50.06 740.72 5/9/2016 44.72 746.06 MW-202S 7/7/2015 789.97 46.66 743.31 9/28/2015 49.91 740.06 5/9/2016 45.30 744.67 MW-203BR 7/7/2015 787.26 32.36 754.90 -- -- -- 5/9/2016 33.87 753.39 MW-203D 7/7/2015 785.57 31.12 754.45 -- -- -- M W-203S 7/7/2015 786.14 31.22 754.92 -- -- -- MW-204D 7/7/2015 776.78 26.10 750.68 9/28/2015 30.00 746.78 Page 6 of 7 Belews Creek Steam Station CSA Supplement 2 Table 3-6: Groundwater Elevations Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation MW-204S 7/7/2015 776.29 25.60 750.69 9/28/2015 28.40 747.89 M W-3 842.81 -- -- -- 5/9/2016 49.70 793.11 Page 7 of 7 Belews Creek Steam Station CSA Supplement 2 Table 3-7: Summary of Cation -Anion Balance Differences Constituent: Molecular Weight (g/mol) Charge Equivalent Weight : Site Location Matrix Date Anions Cations Charge Balance (%) Alkalinity, CO3 Alkalinity, HCO3 Chloride Nitrogen, NO2 plus NO3 Sulfate SUM of Anions Calcium Magnesium Potassium Sodium SUM of Cations 60 61 35.5 62 96.1 40.1 24.3 39.1 23 2 1 1 1 2 2 2 1 1 30 61 35.5 62 48.05 20.05 12.15 39.1 23 Result eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L Belews SW-AB2 Surface Water 3/31/2016 _ 24.8 0.407 441 12.423 149 140 0 0 0.091 0.001 3.101 15.932 205 10.224 55.2 4.543 8.28 0.212 13.6 0.591 15.57 -1.1% SW-AB3 Surface Water 3/31/2016 0 0 24.4 0.4 450 12.676 0.08 0.001 2.914 15.991 208 10.374 54.3 4.469 7.94 0.203 13 0.565 15.611 -1.2% SW-AB4 Surface Water 3/31/2016 0 0 48.5 0.795 38.2 1.076 0.11 0.002 50.7 1.055 2.928 34.6 1.726 11.7 0.963 3.99 0.102 7.92 0.344 3.135 3.4% SW-AB5 Surface Water 3/31/2016 0 0 41.3 0.677 19.6 0.552 0.033 0.001 87.8 1.827 3.057 33.7 1.681 12 0.988 4.62 0.118 10.4 0.452 3.239 2.9% SW-AB6 Surface Water 3/31/2016 0 0 25 0.41 4.8 0.135 0.15 0.002 22.4 0.466 1.013 10.2 0.509 3.58 0.295 0 0 7.05 0.307 1.111 4.6% SW-AB7 Surface Water 3/31/2016 0 0 1.7 0.028 12.5 0.352 0.055 0.001 22.7 0.472 0.853 5.06 0.252 2.27 0.187 0 0 8.6 0.374 0.813 -2.4% SW-AB8 Surface Water 3/31/2016 0 0 3.5 0.057 14.7 0.414 0.05 0.001 32.4 0.674 1.146 5.97 0.298 2.53 0.208 0 0 9.44 0.41 0.916 -11.2% SW-AB9 Surface Water 3/31/2016 0 0 33.6 0.551 8.6 0.242 0.025 0 8.9 0.185 0.978 9.71 0.484 3.41 0.281 3.53 0.09 6.44 0.28 1.135 7.4% SW-10 Surface Water 3/31/2016 0 0 4.5 0.074 411 11.577 0.11 0.002 88.6 1.844 13.497 163 8.13 49.5 4.074 4.83 0.124 12.9 0.561 12.889 -2.3% SW-BL-D Surface Water 3/31/2016 0 0 29.1 0.477 7.4 0.208 0.067 0.001 8.8 0.183 0.869 7.87 0.393 3.53 0.291 3.67 0.094 6.89 0.3 1.078 10.7% SW-BL-U Surface Water 3/31/2016 0 0 17.9 0.293 5.3 0.149 0.071 0.001 2.8 0.058 0.501 3.38 0.169 1.82 0.15 0 0 6.24 0.271 0.59 8.2% SW-DR-D Surface Water 3/31/2016 0 0 20.5 0.336 3.7 0.104 0.18 0.003 3.6 0.075 0.518 5.35 0.267 2.13 0.175 0 0 4.44 0.193 0.635 10.1% SW-DR-U Surface Water 3/31/2016 0 0 24.2 0.397 412 11.606 0.087 0.001 138 2.872 14.876 204 10.175 55.7 4.584 8.43 0.216 13.9 0.604 15.579 2.3% AB-113 Groundwater 3/30/2016 0 0 7.6 0.125 504 14.197 0 0 116 2.414 16.736 222 11.072 58.3 4.798 4.4 0.113 11.4 0.496 16.479 -0.8% AB-1 S Groundwater 3/30/2016 0 0 10.5 0.172 490 13.803 0 0 137 2.851 16.826 233 11.621 64.4 5.3 4.52 0.116 10.8 0.47 17.507 2.0% AB-2D Groundwater 3/30/2016 0 0 18.6 0.305 466 13.127 0 0 81.8 1.702 15.134 216 10.773 50.8 4.181 5.02 0.128 13.1 0.57 15.652 1.7% AB-2S Groundwater 3/30/2016 0 0 123 2.016 7.5 0.211 0 0 16.3 0.339 2.566 51 2.544 2.23 0.184 2.66 0.068 6.92 0.301 3.097 9.4% AB-31) Groundwater 3/30/2016 0 0 105 1.721 279 7.859 0 0 25.8 0.537 10.117 153 7.631 30.2 2.486 4.64 0.119 21.7 0.943 11.179 5.0% AB-3S Groundwater 3/30/2016 0 0 24 0.393 492 13.859 0 0 131 2.726 16.978 242 12.07 67.9 5.588 8.24 0.211 12.1 0.526 18.395 4.0% AB-4BR Groundwater 4/1/2016 84.7 2.823 0 0 3.7 0.104 0 0 15.4 0.32 3.247 40.6 2.025 0.176 0.014 7.75 0.198 14.9 0.648 2.885 -5.9% AB-41) Groundwater 4/1/2016 0 0 112 1.836 3 0.085 0.063 0.001 3.9 0.081 2.003 26.3 1.312 5.4 0.444 2.59 0.066 26.3 1.143 2.965 19.4% AB-51) Groundwater 3/31/2016 0 0 45.1 0.739 0.84 0.024 0.031 0.001 2.8 0.058 0.822 7.68 0.383 2.16 0.178 0 0 8.73 0.38 0.941 6.7% AB-6D Groundwater 3/31/2016 0 0 47.4 0.777 1.3 0.037 0.084 0.001 4.2 0.087 0.902 9.79 0.488 2.87 0.236 0 0 8.26 0.359 1.083 9.1% AB-71) Groundwater 4/1/2016 0 0 32.7 0.536 3.8 0.107 0 0 9.9 0.206 0.849 8.06 0.402 2.25 0.185 3.15 0.081 9.09 0.395 1.063 11.2% AB-8D Groundwater 3/31/2016 0 0 42.9 0.703 5.8 0.163 0.26 0.004 1.5 0.031 0.901 8.18 0.408 2.3 0.189 2.6 0.066 8.12 0.353 1.016 6.0% AB-9BR Groundwater 4/1/2016 68.1 2.27 0 0 5 0.141 0 0 0.59 0.012 2.423 43.8 2.185 0.11 0.009 4.82 0.123 17.3 0.752 3.069 11.8% AB-9D Groundwater 4/1/2016 0 0 126 2.066 5.6 0.158 0 0 9.9 0.206 2.43 33.2 1.656 7.86 0.647 3.09 0.079 10.2 0.443 2.825 7.5% AB-9S Groundwater 4/1/2016 0 0 7.2 0.118 5.4 0.152 0.28 0.005 1.4 0.029 0.304 0.678 0.034 0.899 0.074 0 0 5.03 0.219 0.327 3.6% BC-23A Groundwater 3/30/2016 0 0 17.3 0.284 1.9 0.054 0 0 0.74 0.015 0.353 1.49 0.074 0.848 0.07 0 0 5.94 0.258 0.402 6.5% BC-28 Groundwater 3/29/2016 0 0 21.7 0.356 1.8 0.051 1.1 0.018 2.2 0.046 0.471 4.7 0.234 1.42 0.117 0 0 5.01 0.218 0.569 9.4% BG-1 D Groundwater 3/29/2016 0 0 11.9 0.195 7.5 0.211 1.4 0.023 2.8 0.058 0.487 3.26 0.163 2.18 0.179 3.31 0.085 6.04 0.263 0.69 17.2% BG-2BR Groundwater 3/29/2016 12.9 0.43 51.7 0.848 4 0.113 0.15 0.002 21.1 0.439 1.832 23.4 1.167 1.65 0.136 10.2 0.261 9.87 0.429 1.993 4.2% BG-2D Groundwater 3/29/2016 0 0 46.2 0.757 14.8 0.417 0.72 0.012 2.9 0.06 1.246 13.2 0.658 7.03 0.579 0 0 6.6 0.287 1.524 10.0% BG-2S Groundwater 3/29/2016 0 0 22.9 0.375 18.8 0.53 0.67 0.011 0.95 0.02 0.936 8.03 0.4 4.23 0.348 0 0 7.03 0.306 1.054 5.9% BG-3D Groundwater 3/30/2016 0 0 19.6 0.321 5.5 0.155 2.8 0.045 0.79 0.016 0.537 4.7 0.234 2.05 0.169 0 0 7.63 0.332 0.735 15.6% BG-3S Groundwater 3/30/2016 0 0 8.7 0.143 1.6 0.045 2 0.032 0.64 0.013 0.233 2.11 0.105 1.3 0.107 0 0 3.3 0.143 0.355 20.7% CRW-10 Groundwater 3/29/2016 0 0 6.2 0.102 37.5 1.056 0.6 0.01 37.7 0.785 1.953 22.7 1.132 8.02 0.66 3.54 0.091 8.57 0.373 2.256 7.2% GWA-10D Groundwater 3/29/2016 177 5.9 0 0 16.2 0.456 0.027 0 2.2 0.046 6.402 85.2 4.249 0.272 0.022 19.7 0.504 15.5 0.674 5.449 -8.0% GWA-10S Groundwater 3/29/2016 0 0 0 0 56.3 1.586 0.28 0.005 1.4 0.029 1.62 1.99 0.099 7.99 0.658 3.4 0.087 11.6 0.504 1.348 -9.2% GWA-11 D Groundwater 3/29/2016 0 0 49.5 0.811 141 3.972 0.069 0.001 6.8 0.142 4.926 55 2.743 21.3 1.753 8.47 0.217 20.6 0.896 5.609 6.5% GWA-11S Groundwater 3/29/2016 0 0 1.2 0.02 95 2.676 0.23 0.004 0 0 2.7 15 0.748 18.1 1.49 4.29 0.11 13.6 0.591 2.939 4.2% GWA-12BR Groundwater 4/1/2016 0 0 79.6 1.305 1.3 0.037 0 0 6.2 0.129 1.471 18 0.898 4.45 0.366 2.75 0.07 8.72 0.379 1.713 7.6% GWA-12D Groundwater 3/29/2016 0 0 34.9 0.572 1.7 0.048 0.029 0 1.9 0.04 0.66 4.38 0.218 1.83 0.151 0 0 8 0.348 0.717 4.1 % GWA-12S Groundwater 4/1/2016 0 0 22.8 0.374 1.2 0.034 0.31 0.005 1.1 0.023 0.436 2.81 0.14 1.04 0.086 0 0 5.33 0.232 0.458 2.5% GWA-16BR Groundwater 4/28/2016 188 6.267 75.4 1.236 4.6 0.13 0.21 0.003 77.6 1.615 9.251 64.1 3.197 0.112 0.009 18 0.46 97.2 4.226 7.892 -7.9% GWA-16D Groundwater 3/30/2016 111 3.7 0 0 1.8 0.051 0.067 0.001 19.9 0.414 4.166 6.29 0.314 0.0778 0.006 71.5 1.829 53.1 2.309 4.458 3.4% GWA-16S Groundwater 3/31/2016 0 0 5.5 0.09 0.69 0.019 0.011 0 0.82 0.017 0.126 0.303 0.015 0.929 0.076 0 0 0 0 0.091 -16.1% GWA-17D Groundwater 3/30/2016 0 0 54.6 0.895 0.95 0.027 0 0 13.3 0.277 1.199 19 0.948 1.66 0.137 0 0 6.07 0.264 1.349 5.9% Belews Creek Steam Station Page 1 of 3 CSA Supplement 2 Table 3-7: Summary of Cation -Anion Balance Differences Anions Cations Constituent: Molecular Weight (g/mol) Charge Equivalent Weight: Site Location Matrix Date Alkalinity, CO3 Alkalinity, HCO3 Chloride Nitrogen, NO2 plus NO3 Sulfate Sum of Anions Calcium Magnesium Potassium Sodium Sum of Cations Charge Balance (%) 60 61 35.5 62 96.1 40.1 24.3 39.1 23 2 1 1 1 2 2 2 1 1 30 61 35.5 62 48.05 20.05 12.15 39.1 23 Result eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L GWA-17S Groundwater 3/31/2016 0 0 21.9 0.359 1.2 0.034 0.011 0 19.5 0.406 0.799 4.51 0.225 4.1 0.337 3.11 0.08 5.09 0.221 0.863 3.9% GWA-18D Groundwater 3/31/2016 0 0 53 0.869 7.2 0.203 0.22 0.004 5.8 0.121 1.197 16.1 0.803 2.12 0.174 2.85 0.073 10.6 0.461 1.511 11.6% GWA-18S Groundwater 4/27/2016 0 0 21.9 0.359 21.5 0.606 0 0 9.4 0.196 1.161 3.44 0.172 2.84 0.234 14.8 0.379 13.5 0.587 1.372 8.3% GWA-19D Groundwater 4/28/2016 0 0 46 0.754 3 0.085 0 0 9.5 0.198 1.037 11.1 0.554 4.02 0.331 4.51 0.115 9.74 0.423 1.423 15.7% GWA-19S Groundwater 3/31/2016 0 0 0 0 159 4.479 0.12 0.002 0.74 0.015 4.496 15.1 0.753 25.5 2.099 6.14 0.157 9.82 0.427 3.436 -13.4% GWA-1D Groundwater 4/1/2016 0 0 44.6 0.731 50.3 1.417 0.87 0.014 6.4 0.133 2.295 6.4 0.319 2.84 0.234 2.83 0.072 50.2 2.183 2.808 10.1% GWA-1S Groundwater 4/1/2016 0 0 0 0 36.9 1.039 1.1 0.018 0.65 0.014 1.071 2.04 0.102 10.4 0.856 0 0 5.17 0.225 1.183 5.0% GWA-20D Groundwater 3/30/2016 0 0 17.2 0.282 369 10.394 0.01 0 44.1 0.918 11.594 118 5.885 53.6 4.412 10.4 0.266 36.5 1.587 12.15 2.3% GWA-21 D Groundwater 3/30/2016 0 0 7.5 0.123 138 3.887 0.46 0.007 2.3 0.048 4.065 24.7 1.232 21.4 1.761 6.05 0.155 25 1.087 4.235 2.0% GWA-21S Groundwater 3/30/2016 0 0 2.4 0.039 104 2.93 0.25 0.004 1 0.021 2.994 10.2 0.509 18.8 1.547 4.11 0.105 19.5 0.848 3.009 0.2% GWA-23D Groundwater 4/27/2016 0 0 116 1.902 8.3 0.234 1.4 0.023 881 18.335 20.494 204 10.175 112 9.218 9.38 0.24 51.1 2.222 21.855 3.2% GWA-23S Groundwater 4/28/2016 0 0 48.9 0.802 6.2 0.175 0.23 0.004 313 6.514 7.495 55.8 2.783 37.9 3.119 5.41 0.138 33.8 1.47 7.51 0.1 % GWA-24D Groundwater 4/27/2016 0 0 14.1 0.231 36.4 1.025 0.028 0 4.8 0.1 1.356 10.7 0.534 5.64 0.464 3.54 0.091 9.61 0.418 1.507 5.3% GWA-2D Groundwater 4/1/2016 0 0 30.2 0.495 1.5 0.042 0.048 0.001 1.5 0.031 0.569 4.5 0.224 2.17 0.179 0 0 5.87 0.255 0.658 7.3% GWA-2S Groundwater 4/1/2016 0 0 5.2 0.085 1.4 0.039 0.063 0.001 0.78 0.016 0.141 0.175 0.009 0.416 0.034 0 0 2.64 0.115 0.158 5.7% GWA-31) Groundwater 3/29/2016 0 0 31.2 0.511 10.4 0.293 1.7 0.027 0.81 0.017 0.848 12 0.599 1.14 0.094 3.22 0.082 8.59 0.373 1.148 15.0% GWA-41) Groundwater 3/29/2016 0 0 125 2.049 6.8 0.192 0.59 0.01 2.1 0.044 2.295 33.2 1.656 3.73 0.307 0 0 18.1 0.787 2.75 9.0% GWA-5BR2 Groundwater 3/29/2016 1.2 0.04 58 0.951 5.6 0.158 0.095 0.002 9.2 0.191 1.342 22.6 1.127 2.27 0.187 4.12 0.105 16.9 0.735 2.154 23.2% GWA-51) Groundwater 3/29/2016 0 0 132 2.164 4.1 0.115 2.3 0.037 3.7 0.077 2.393 32.4 1.616 6.54 0.538 0 0 17.6 0.765 2.919 9.9% GWA-5S Groundwater 3/29/2016 0 0 29 0.475 2.7 0.076 2 0.032 0 0 0.583 7.85 0.392 1.24 0.102 0 0 6.08 0.264 0.758 13.0% GWA-6D Groundwater 3/30/2016 0 0 135 2.213 2.9 0.082 0 0 4.1 0.085 2.38 30.3 1.511 6.94 0.571 3.35 0.086 16.3 0.709 2.877 9.5% GWA-6S Groundwater 3/30/2016 0 0 5.2 0.085 10 0.282 0.67 0.011 11.6 0.241 0.619 3.78 0.189 3.26 0.268 3.17 0.081 3.67 0.16 0.698 6.0% GWA-71) Groundwater 3/30/2016 0 0 119 1.951 19.6 0.552 0.37 0.006 7.6 0.158 2.667 32.5 1.621 8.65 0.712 5.18 0.132 15.7 0.683 3.148 8.3% GWA-7S Groundwater 3/30/2016 0 0 3.2 0.052 22.9 0.645 0.031 0.001 22.8 0.475 1.173 1.61 0.08 8.1 0.667 0 0 10.1 0.439 1.186 0.6% GWA-81) Groundwater 3/30/2016 0 0 66.5 1.09 5.5 0.155 0 0 9 0.187 1.432 15.8 0.788 3.59 0.295 3 0.077 11.8 0.513 1.673 7.8% GWA-8S Groundwater 3/30/2016 0 0 19.7 0.323 3.1 0.087 0 0 49.1 1.022 1.432 19.7 0.983 3.52 0.29 0 0 5.23 0.227 1.5 2.3% GWA-91) Groundwater 3/30/2016 0 0 36.6 0.6 14.5 0.408 0.92 0.015 5.6 0.117 1.14 11.7 0.584 4.58 0.377 0 0 8.02 0.349 1.31 6.9% GWA-9S Groundwater 3/30/2016 0 0 6 0.098 0.96 0.027 0.074 0.001 0.92 0.019 0.145 0.84 0.042 0.51 0.042 0 0 0 0 0.084 -26.6% MW-103D Groundwater 3/30/2016 0 0 2.3 0.038 226 6.366 0.088 0.001 0.94 0.02 6.425 40.1 2 37.6 3.095 6.96 0.178 28 1.217 6.49 0.5% MW-103S Groundwater 3/30/2016 0 0 13.6 0.223 227 6.394 0 0 0.6 0.012 6.629 17.7 0.883 34.7 2.856 3.18 0.081 21.4 0.93 4.75 -16.5% MW-104D Groundwater 3/30/2016 0 0 64.5 1.057 1 0.028 0.15 0.002 1.9 0.04 1.127 10.6 0.529 5.29 0.435 0 0 8.68 0.377 1.341 8.7% MW-201 BR Groundwater 4/27/2016 0 0 79.2 1.298 5.7 0.161 0 0 18.9 0.393 1.852 24.2 1.207 5.9 0.486 9.38 0.24 12.3 0.535 2.468 14.3% MW-202BR Groundwater 3/29/2016 0 0 32.2 0.528 3 0.085 0.12 0.002 4.9 0.102 0.717 6.36 0.317 2.31 0.19 0 0 8.86 0.385 0.892 10.9% MW-202D Groundwater 3/29/2016 0 0 28.1 0.461 2.7 0.076 0.17 0.003 1.8 0.037 0.577 4.07 0.203 2.04 0.168 0 0 7.89 0.343 0.714 10.6% MW-202S Groundwater 3/29/2016 0 0 12.6 0.207 1.7 0.048 0.039 0.001 0.57 0.012 0.268 1.06 0.053 0.519 0.043 0 0 5.22 0.227 0.323 9.3% MW-203BR Groundwater 3/30/2016 0 0 60.9 0.998 2.4 0.068 0.43 0.007 2.7 0.056 1.129 10.3 0.514 5.41 0.445 0 0 8.2 0.357 1.316 7.6% MW-3 Groundwater 3/29/2016 0 0 4.8 0.079 10.7 0.301 0 0 0 0 0.38 2.85 0.142 1.03 0.085 2.88 0.074 3.09 0.134 0.435 6.7% AB-4S Porewater 4/1/2016 0 0 70.3 1.152 614 17.296 0 0 190 3.954 22.402 305 15.212 98.3 8.091 8.95 0.229 15.6 0.678 24.21 3.9% AB-4SL Porewater 4/1/2016 135 4.5 0 0 8.5 0.239 0 0 0.56 0.012 4.751 139 6.933 0.268 0.022 14.7 0.376 0 0 7.331 21.4% AB-5S Porewater 3/31/2016 0 0 76 1.246 38.2 1.076 0 0 50.2 1.045 3.367 45.6 2.274 10.9 0.897 4.64 0.119 7.14 0.31 3.6 3.3% AB-5SL Porewater 3/31/2016 58 1.933 0 0 534 15.042 0 0 228 4.745 21.72 381 19.002 7.85 0.646 21.6 0.552 13.4 0.583 20.783 -2.2% AB-6S Porewater 3/31/2016 0 0 39.4 0.646 7.4 0.208 0.081 0.001 13.3 0.277 1.132 12.5 0.623 4.51 0.371 4.08 0.104 7.07 0.307 1.405 10.8% AB-6SL Porewater 3/31/2016 0 0 93.2 1.528 7.4 0.208 0 0 4.7 0.098 1.834 28.6 1.426 4.31 0.355 4.38 0.112 5.66 0.246 2.139 7.7% AB-7S Porewater 4/1/2016 0 0 0 0 30.6 0.862 0 0 637 13.257 14.119 75.2 3.751 25.8 2.123 0 0 29.8 1.296 7.17 -32.6% AB-8S Porewater 3/31/2016 0 0 6.7 0.11 1.5 0.042 0.042 0.001 38.7 0.805 0.958 14.9 0.743 1.32 0.109 0 0 0 0 0.852 -5.9% AB-8SL Porewater 3/31/2016 0 0 217 3.557 7.2 0.203 0 0 8.5 0.177 3.937 39.3 1.96 11.5 0.947 7.51 0.192 7.56 0.329 3.428 -6.9% S-1 AOW 3/31/2016 0 0 20.2 0.331 2.6 0.073 0.032 0.001 1.8 0.037 0.442 3.64 0.182 2.34 0.193 0 0 3.43 0.149 0.524 8.5% S-2 AOW 3/31/2016 0 0 3.3 0.054 53.4 1.504 0.042 0.001 1 0.021 1.58 7.3 0.364 8.26 0.68 3.09 0.079 8.8 0.383 1.506 S-3 AOW 3/31/2016 0 0 5.3 0.087 4.5 0.127 0.014 0 1.3 0.027 0.241 1.11 0.055 1.05 0.086 0 0 2.55 0.111 0.252 2.2% Belews Creek Steam Station Page 2 of 3 CSA Supplement 2 Table 3-7: Summary of Cation -Anion Balance Differences Anions Cations Constituent: Molecular Weight (g/mol) Charge Equivalent Weight : Alkalinity, CO3 Alkalinity, HCO3 Chloride Nitrogen, NO2 plus NO3 Sulfate Sum of Anions Calcium Magnesium Potassium Sodium Sum of Cations Charge Balance (%) 60 61 35.5 62 96.1 40.1 24.3 39.1 23 2 1 1 1 2 2 2 1 1 30 61 35.5 62 48.05 20.05 12.15 39.1 23 Site Location Matrix Date Result eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L S-4 AOW 3/31/2016 S-5 AOW 3/31/2016 0 0 0 3.8 0.062 70.2 1.977 0.067 0.001 0.77 0.016 2.056 12 0.599 10.2 0.84 3.33 0.085 11.1 0.483 2.007 -1.2% 0 9.1 0.149 2.8 0.079 0.16 0.003 1.5 0.031 0.262 1.7 0.085 1.24 0.102 0 0 2.57 0.112 0.299 6.6% S-6 AOW 3/31/2016 0 0 49.4 0.81 106 2.986 0.24 0.004 29.6 0.616 4.416 55.3 2.758 14.8 1.218 3.92 0.1 12 0.522 4.598 2.0% S-7 AOW 3/31/2016 0 0 6 0.098 3.8 0.107 0.016 0 1.5 0.031 0.236 0.819 0.041 0.972 0.08 0 0 2.93 0.127 0.248 2.5% S-8 AOW 3/31/2016 0 0 21.3 0.349 14.7 0.414 0.32 0.005 8.7 0.181 0.949 5.96 0.297 3.27 0.269 0 0 11.2 0.487 1.053 5.2% S-9 AOW 3/31/2016 0 0 15.9 0.261 8.6 0.242 1.2 0.019 197 4.1 4.622 40.2 2.005 21.9 1.802 3.13 0.08 20.6 0.896 4.783 1.7% S-10 AOW 3/31/2016 FT:� 0 4 0.066 412 11.606 0.1 0.002 84.2 1.752 13.426 159 7.93 50.4 4.148 5.15 0.132 14 0.609 12.819 -2.3% " NO2 + NO3 is being used as a surrogate for nitrate and the molecular weight of nitrate is assumed. Results of "0" are reported as non -detects by the analytical laboratory. Dataset consists of aqueous data associated with the first quarter of 2016 (even if dates do not align to traditional quarters). Formulas: Molecular Weight ( 9 Result Value (Lg) MolecularWt.(� Cations(i)+E Anions(i) E Cations ( ) - E Anions(i ) Charge Equivalent Weight = eq/L = g CBE% = x 100 (mo�)\ lCharge J Belews Creek Steam Station Page 3 of 3 CSA Supplement 2